海水電池市場 - 世界の産業規模、シェア、動向、機会、予測、セグメント別、タイプ別、用途別、地域別、競合別、2020～2030年

海水電池の世界市場規模は2024年に6億57万米ドルで、2030年にはCAGR 26.81%で25億1,986万米ドルに達すると予測されています。

海水電池市場は、海水を電解質としてエネルギー貯蔵に利用する電池の開発、生産、展開、商業化に焦点を当てた産業セグメントを指します。海水電池は、海水中のナトリウムイオンが電荷キャリアとして作用するイオン交換の原理によって作動し、従来のリチウムイオン電池に代わる環境にやさしく豊富な電解質を提供します。海水電池は、特に再生可能エネルギー統合、海洋エネルギー貯蔵システム、スマートグリッド、バックアップ電源システムなどの大規模な定置型用途において、持続可能で安全なエネルギー貯蔵ソリューションを提供する可能性があるため、注目を集めています。

リチウム、コバルト、ニッケルなど、限られた、そしてしばしば地政学的に敏感な材料に依存する従来の電池とは異なり、海水電池は、広く入手可能で安価なナトリウムを活用しています。この市場には、研究機関、電池メーカー、エネルギー企業、海洋技術プロバイダーなどさまざまな利害関係者が含まれ、エネルギー密度、効率、商業的実現性を向上させるための技術革新に投資しています。市場を牽引しているのは、環境に優しいエネルギー貯蔵システムに対する需要の高まり、従来のバッテリーが環境に与える影響に対する懸念の高まり、エネルギー安全保障を確保する費用対効果の高い代替品に対するニーズです。材料科学、電気化学、システム統合における技術的進歩が、より堅牢で効率的な海水電池システムの進化を可能にしています。

主な市場促進要因

持続可能で環境に優しいエネルギー貯蔵ソリューションへのニーズの高まり

主な市場課題

技術的複雑性と性能の限界

主な市場動向

環境に優しく持続可能なエネルギー貯蔵ソリューションへの需要の高まり

目次

第1章 概要

第2章 調査手法

第3章 エグゼクティブサマリー

第4章 顧客の声

第5章 世界の海水電池市場展望

• 市場規模・予測
  • 金額別
• 市場シェア・予測
  • タイプ別（天然海水バッテリーと混合海水バッテリー）
  • 用途別（住宅ESS、産業用ESS、軍事用途など）
  • 地域別
• 企業別（2024年）
• 市場マップ

第6章 北米の海水電池市場展望

• 市場規模・予測
• 市場シェア・予測
• 北米：国別分析
  • 米国
  • カナダ
  • メキシコ

第7章 欧州の海水電池市場展望

• 市場規模・予測
• 市場シェア・予測
• 欧州：国別分析
  • ドイツ
  • 英国
  • イタリア
  • フランス
  • スペイン

第8章 アジア太平洋地域の海水電池市場展望

• 市場規模・予測
• 市場シェア・予測
• アジア太平洋地域：国別分析
  • 中国
  • インド
  • 日本
  • 韓国
  • オーストラリア

第9章 南米の海水電池市場展望

• 市場規模・予測
• 市場シェア・予測
• 南米：国別分析
  • ブラジル
  • アルゼンチン
  • コロンビア

第10章 中東・アフリカの海水電池市場展望

• 市場規模・予測
• 市場シェア・予測
• 中東・アフリカ：国別分析
  • 南アフリカ
  • サウジアラビア
  • アラブ首長国連邦
  • クウェート
  • トルコ

第11章 市場力学

• 促進要因
• 課題

第12章 市場動向と発展

• 合併と買収
• 製品上市
• 最近の動向

第13章 企業プロファイル

• Blue Energy Co., Ltd.
• Korea Electric Power Corporation（KEPCO）
• SK Innovation Co., Ltd.
• POSCO Holdings Inc.
• Samsung SDI Co., Ltd.
• Hyundai Electric & Energy Systems Co., Ltd.
• Korea Institute of Energy Research（KIER）
• Korea Advanced Institute of Science and Technology（KAIST）
• Aqua Power Systems Inc.
• LG Energy Solution Ltd.

第14章 戦略的提言

第15章 調査会社について・免責事項

Global Seawater Battery Market was valued at USD 600.57 Million in 2024 and is expected to reach USD 2519.86 Million by 2030 with a CAGR of 26.81%. The seawater battery market refers to the industry segment focused on the development, production, deployment, and commercialization of batteries that utilize seawater as an electrolyte for energy storage. These batteries operate through the principle of ion exchange, where sodium ions in seawater act as the charge carriers, offering an eco-friendly and abundant alternative to traditional lithium-ion batteries. Seawater batteries are gaining attention due to their potential to provide sustainable and safe energy storage solutions, especially in large-scale stationary applications such as renewable energy integration, marine energy storage systems, smart grids, and backup power systems.

Unlike conventional batteries that rely on limited and often geopolitically sensitive materials like lithium, cobalt, or nickel, seawater batteries capitalize on sodium, which is widely available and less expensive. This market encompasses various stakeholders, including research institutions, battery manufacturers, energy companies, and marine technology providers, who are investing in innovation to improve energy density, efficiency, and commercial viability. The market is driven by increasing demand for green energy storage systems, rising concerns about the environmental impact of conventional batteries, and the need for cost-effective alternatives that ensure energy security. Technological advancements in materials science, electrochemistry, and system integration are enabling the evolution of more robust and efficient seawater battery systems.

Key Market Drivers

Growing Need for Sustainable and Eco-Friendly Energy Storage Solutions

The increasing global emphasis on environmental sustainability is a significant driver propelling the growth of the seawater battery market. Traditional lithium-ion and lead-acid batteries, though widely used, pose considerable environmental and safety concerns due to the toxic and flammable chemicals they contain, as well as the limited and environmentally harmful mining of lithium, cobalt, and other rare earth elements. In contrast, seawater batteries offer an environmentally benign alternative that uses abundant, non-toxic materials such as sodium and water, drastically reducing ecological risks and raw material dependency. With the global shift toward decarbonization and circular economy initiatives, seawater batteries align perfectly with long-term sustainability goals.

Moreover, as government regulations and international policies increasingly pressure industries to reduce their carbon footprint and adopt cleaner technologies, the demand for energy storage solutions with low environmental impact has grown substantially. Seawater batteries not only produce zero emissions during operation but also have recyclable components, making them suitable for large-scale deployment in residential, commercial, and industrial settings. Their potential for use in coastal and offshore energy projects adds to their appeal, particularly in island nations and coastal regions seeking renewable energy integration. Additionally, as consumer awareness regarding environmental responsibility continues to increase, businesses and utility companies are under mounting pressure to choose eco-friendly energy storage technologies.

The scalability and cost-effectiveness of seawater batteries further enhance their appeal for utilities looking to balance sustainability with operational efficiency. These factors collectively contribute to a paradigm shift away from conventional battery systems toward innovative, nature-compatible solutions like seawater batteries, making sustainability one of the core pillars driving market expansion. Over 70% of global energy storage investments are now directed toward sustainable and low-emission technologies. The market for eco-friendly energy storage is projected to grow at a CAGR of over 20% in the next five years. More than 50 countries have announced net-zero goals, driving demand for green energy storage systems. Over 60% of new grid-scale storage projects now prioritize sustainability in material and design. The global push to reduce carbon emissions could lead to over 300 GW of green energy storage capacity by 2030. Eco-friendly battery alternatives are expected to replace nearly 40% of traditional lithium-ion systems by 2035.

Key Market Challenges

Technical Complexity and Performance Limitations

One of the most pressing challenges facing the seawater battery market is the persistent technical complexity and performance limitations of the technology when compared to more established energy storage systems such as lithium-ion or flow batteries. Seawater batteries are still in a relatively early phase of development, and while their core advantages-such as the use of abundant and non-toxic materials-are appealing, they continue to face significant hurdles in achieving competitive energy density, power output, and cycle life.

The electrochemical reactions in seawater batteries involve complex processes such as sodium-ion movement in a saline environment, corrosion resistance of materials, and stability of electrodes, all of which introduce intricate design and operational constraints. Achieving a balance between safety, performance, and cost-efficiency is proving difficult because the fundamental chemistry of seawater batteries is not yet fully optimized for long-term durability or high-efficiency energy conversion. Additionally, the relatively low energy density of current seawater battery prototypes makes them less viable for high-demand applications such as electric vehicles or grid-scale energy storage, where compactness and fast charging are critical. This limitation significantly reduces the addressable market and restricts deployment to niche use cases unless major technological breakthroughs are achieved.

Material selection poses another issue, as electrodes must be highly corrosion-resistant in order to withstand continuous exposure to saltwater, which narrows the choice of available materials and increases costs. Furthermore, the system's sensitivity to environmental conditions, such as temperature fluctuations and water purity, complicates its real-world deployment, particularly in remote or off-grid locations where operational conditions are less controllable. While seawater is abundant and free, the process of utilizing it effectively in an energy storage system requires extensive filtration and control mechanisms, which again adds layers of complexity and cost.

These technical limitations lead to reduced investor confidence, slower commercialization, and minimal integration into mainstream energy systems. R&D efforts are ongoing, but the gap between lab-scale performance and industrial-scale feasibility remains wide. Until these technical bottlenecks are resolved, seawater batteries will continue to struggle against the well-established infrastructure, performance benchmarks, and economies of scale already achieved by conventional battery technologies, thereby hindering their growth trajectory in the global energy storage market.

Key Market Trends

Increasing Demand for Eco-Friendly and Sustainable Energy Storage Solutions

The seawater battery market is witnessing a notable trend toward eco-friendly and sustainable energy storage technologies, primarily driven by growing concerns over environmental degradation, resource depletion, and the long-term implications of toxic waste from conventional battery chemistries. Unlike traditional lithium-ion batteries, seawater batteries utilize naturally abundant materials like sodium, which are not only environmentally benign but also cost-effective and easier to source without causing ecological harm.

This inherent environmental compatibility aligns with global efforts to reduce dependence on hazardous materials such as cobalt, lead, and nickel, which pose serious risks during mining, usage, and disposal. Furthermore, seawater batteries are non-flammable and thermally stable, which significantly reduces the risks of explosion or fire-an important advantage as industries and governments seek safer alternatives for grid-level and distributed energy storage systems. The trend is also fueled by the accelerated shift towards renewables such as solar and wind power, both of which demand reliable and scalable storage solutions to balance intermittent energy generation. Seawater batteries provide a promising route for long-duration energy storage, and their sustainable chemistry ensures minimal environmental footprint throughout the battery lifecycle.

As a result, industries across marine, offshore, residential, and utility sectors are showing increased interest in piloting and deploying seawater-based storage systems. The push for net-zero emissions and green energy transitions in both developed and developing economies is further reinforcing this demand, as policy-makers increasingly favor clean technologies that are resource-responsible and align with circular economy principles. Corporations and research institutions are investing heavily in the optimization of seawater battery performance, lifespan, and scalability to support this trend.

The availability of seawater across coastal regions, combined with the elimination of rare earth dependence, is positioning this technology as a strategic alternative, especially for countries with limited access to lithium or where battery recycling infrastructures are underdeveloped. This eco-conscious trend is not only reshaping innovation roadmaps but also influencing government funding, academic research, and corporate strategies toward integrating green battery technologies in a broader sustainability framework.

Key Market Players

• Blue Energy Co., Ltd.
• Korea Electric Power Corporation (KEPCO)
• SK Innovation Co., Ltd.
• POSCO Holdings Inc.
• Samsung SDI Co., Ltd.
• Hyundai Electric & Energy Systems Co., Ltd.
• Korea Institute of Energy Research (KIER)
• Korea Advanced Institute of Science and Technology (KAIST)
• Aqua Power Systems Inc.
• LG Energy Solution Ltd.

Report Scope:

In this report, the Global Seawater Battery Market has been segmented into the following categories, in addition to the industry trends which have also been detailed below:

Seawater Battery Market, By Type:

• Natural Sea Water Battery
• Blended Sea Water Battery

Seawater Battery Market, By Application:

• Residential ESS
• Industrial ESS
• Military Application
• Others

Seawater Battery Market, By Region:

• North America
  • United States
  • Canada
  • Mexico
• Europe
  • France
  • United Kingdom
  • Italy
  • Germany
  • Spain
• Asia-Pacific
  • China
  • India
  • Japan
  • Australia
  • South Korea
• South America
  • Brazil
  • Argentina
  • Colombia
• Middle East & Africa
  • South Africa
  • Saudi Arabia
  • UAE
  • Kuwait
  • Turkey

Competitive Landscape

Company Profiles: Detailed analysis of the major companies presents in the Global Seawater Battery Market.

Available Customizations:

Global Seawater Battery Market report with the given Market data, Tech Sci Research offers customizations according to a company's specific needs. The following customization options are available for the report:

Company Information

• Detailed analysis and profiling of additional Market players (up to five).

Table of Contents

1. Product Overview

• 1.1. Market Definition
• 1.2. Scope of the Market
  • 1.2.1. Markets Covered
  • 1.2.2. Years Considered for Study
• 1.3. Key Market Segmentations

2. Research Methodology

• 2.1. Objective of the Study
• 2.2. Baseline Methodology
• 2.3. Formulation of the Scope
• 2.4. Assumptions and Limitations
• 2.5. Sources of Research
  • 2.5.1. Secondary Research
  • 2.5.2. Primary Research
• 2.6. Approach for the Market Study
  • 2.6.1. The Bottom-Up Approach
  • 2.6.2. The Top-Down Approach
• 2.7. Methodology Followed for Calculation of Market Size & Market Shares
• 2.8. Forecasting Methodology
  • 2.8.1. Data Triangulation & Validation

3. Executive Summary

• 3.1. Overview of the Market
• 3.2. Overview of Key Market Segmentations
• 3.3. Overview of Key Market Players
• 3.4. Overview of Key Regions/Countries
• 3.5. Overview of Market Drivers, Challenges, and Trends

4. Voice of Customer

5. Global Seawater Battery Market Outlook

• 5.1. Market Size & Forecast
  • 5.1.1. By Value
• 5.2. Market Share & Forecast
  • 5.2.1. By Type (Natural Sea Water Battery and Blended Sea Water Battery)
  • 5.2.2. By Application (Residential ESS, Industrial ESS, Military Application, and Others)
  • 5.2.3. By Region
• 5.3. By Company (2024)
• 5.4. Market Map

6. North America Seawater Battery Market Outlook

• 6.1. Market Size & Forecast
  • 6.1.1. By Value
• 6.2. Market Share & Forecast
  • 6.2.1. By Type
  • 6.2.2. By Application
  • 6.2.3. By Country
• 6.3. North America: Country Analysis
  • 6.3.1. United States Seawater Battery Market Outlook
    • 6.3.1.1. Market Size & Forecast
      • 6.3.1.1.1. By Value
    • 6.3.1.2. Market Share & Forecast
      • 6.3.1.2.1. By Type
      • 6.3.1.2.2. By Application
  • 6.3.2. Canada Seawater Battery Market Outlook
    • 6.3.2.1. Market Size & Forecast
      • 6.3.2.1.1. By Value
    • 6.3.2.2. Market Share & Forecast
      • 6.3.2.2.1. By Type
      • 6.3.2.2.2. By Application
  • 6.3.3. Mexico Seawater Battery Market Outlook
    • 6.3.3.1. Market Size & Forecast
      • 6.3.3.1.1. By Value
    • 6.3.3.2. Market Share & Forecast
      • 6.3.3.2.1. By Type
      • 6.3.3.2.2. By Application

7. Europe Seawater Battery Market Outlook

• 7.1. Market Size & Forecast
  • 7.1.1. By Value
• 7.2. Market Share & Forecast
  • 7.2.1. By Type
  • 7.2.2. By Application
  • 7.2.3. By Country
• 7.3. Europe: Country Analysis
  • 7.3.1. Germany Seawater Battery Market Outlook
    • 7.3.1.1. Market Size & Forecast
      • 7.3.1.1.1. By Value
    • 7.3.1.2. Market Share & Forecast
      • 7.3.1.2.1. By Type
      • 7.3.1.2.2. By Application
  • 7.3.2. United Kingdom Seawater Battery Market Outlook
    • 7.3.2.1. Market Size & Forecast
      • 7.3.2.1.1. By Value
    • 7.3.2.2. Market Share & Forecast
      • 7.3.2.2.1. By Type
      • 7.3.2.2.2. By Application
  • 7.3.3. Italy Seawater Battery Market Outlook
    • 7.3.3.1. Market Size & Forecast
      • 7.3.3.1.1. By Value
    • 7.3.3.2. Market Share & Forecast
      • 7.3.3.2.1. By Type
      • 7.3.3.2.2. By Application
  • 7.3.4. France Seawater Battery Market Outlook
    • 7.3.4.1. Market Size & Forecast
      • 7.3.4.1.1. By Value
    • 7.3.4.2. Market Share & Forecast
      • 7.3.4.2.1. By Type
      • 7.3.4.2.2. By Application
  • 7.3.5. Spain Seawater Battery Market Outlook
    • 7.3.5.1. Market Size & Forecast
      • 7.3.5.1.1. By Value
    • 7.3.5.2. Market Share & Forecast
      • 7.3.5.2.1. By Type
      • 7.3.5.2.2. By Application

8. Asia-Pacific Seawater Battery Market Outlook

• 8.1. Market Size & Forecast
  • 8.1.1. By Value
• 8.2. Market Share & Forecast
  • 8.2.1. By Type
  • 8.2.2. By Application
  • 8.2.3. By Country
• 8.3. Asia-Pacific: Country Analysis
  • 8.3.1. China Seawater Battery Market Outlook
    • 8.3.1.1. Market Size & Forecast
      • 8.3.1.1.1. By Value
    • 8.3.1.2. Market Share & Forecast
      • 8.3.1.2.1. By Type
      • 8.3.1.2.2. By Application
  • 8.3.2. India Seawater Battery Market Outlook
    • 8.3.2.1. Market Size & Forecast
      • 8.3.2.1.1. By Value
    • 8.3.2.2. Market Share & Forecast
      • 8.3.2.2.1. By Type
      • 8.3.2.2.2. By Application
  • 8.3.3. Japan Seawater Battery Market Outlook
    • 8.3.3.1. Market Size & Forecast
      • 8.3.3.1.1. By Value
    • 8.3.3.2. Market Share & Forecast
      • 8.3.3.2.1. By Type
      • 8.3.3.2.2. By Application
  • 8.3.4. South Korea Seawater Battery Market Outlook
    • 8.3.4.1. Market Size & Forecast
      • 8.3.4.1.1. By Value
    • 8.3.4.2. Market Share & Forecast
      • 8.3.4.2.1. By Type
      • 8.3.4.2.2. By Application
  • 8.3.5. Australia Seawater Battery Market Outlook
    • 8.3.5.1. Market Size & Forecast
      • 8.3.5.1.1. By Value
    • 8.3.5.2. Market Share & Forecast
      • 8.3.5.2.1. By Type
      • 8.3.5.2.2. By Application

9. South America Seawater Battery Market Outlook

• 9.1. Market Size & Forecast
  • 9.1.1. By Value
• 9.2. Market Share & Forecast
  • 9.2.1. By Type
  • 9.2.2. By Application
  • 9.2.3. By Country
• 9.3. South America: Country Analysis
  • 9.3.1. Brazil Seawater Battery Market Outlook
    • 9.3.1.1. Market Size & Forecast
      • 9.3.1.1.1. By Value
    • 9.3.1.2. Market Share & Forecast
      • 9.3.1.2.1. By Type
      • 9.3.1.2.2. By Application
  • 9.3.2. Argentina Seawater Battery Market Outlook
    • 9.3.2.1. Market Size & Forecast
      • 9.3.2.1.1. By Value
    • 9.3.2.2. Market Share & Forecast
      • 9.3.2.2.1. By Type
      • 9.3.2.2.2. By Application
  • 9.3.3. Colombia Seawater Battery Market Outlook
    • 9.3.3.1. Market Size & Forecast
      • 9.3.3.1.1. By Value
    • 9.3.3.2. Market Share & Forecast
      • 9.3.3.2.1. By Type
      • 9.3.3.2.2. By Application

10. Middle East and Africa Seawater Battery Market Outlook

• 10.1. Market Size & Forecast
  • 10.1.1. By Value
• 10.2. Market Share & Forecast
  • 10.2.1. By Type
  • 10.2.2. By Application
  • 10.2.3. By Country
• 10.3. Middle East and Africa: Country Analysis
  • 10.3.1. South Africa Seawater Battery Market Outlook
    • 10.3.1.1. Market Size & Forecast
      • 10.3.1.1.1. By Value
    • 10.3.1.2. Market Share & Forecast
      • 10.3.1.2.1. By Type
      • 10.3.1.2.2. By Application
  • 10.3.2. Saudi Arabia Seawater Battery Market Outlook
    • 10.3.2.1. Market Size & Forecast
      • 10.3.2.1.1. By Value
    • 10.3.2.2. Market Share & Forecast
      • 10.3.2.2.1. By Type
      • 10.3.2.2.2. By Application
  • 10.3.3. UAE Seawater Battery Market Outlook
    • 10.3.3.1. Market Size & Forecast
      • 10.3.3.1.1. By Value
    • 10.3.3.2. Market Share & Forecast
      • 10.3.3.2.1. By Type
      • 10.3.3.2.2. By Application
  • 10.3.4. Kuwait Seawater Battery Market Outlook
    • 10.3.4.1. Market Size & Forecast
      • 10.3.4.1.1. By Value
    • 10.3.4.2. Market Share & Forecast
      • 10.3.4.2.1. By Type
      • 10.3.4.2.2. By Application
  • 10.3.5. Turkey Seawater Battery Market Outlook
    • 10.3.5.1. Market Size & Forecast
      • 10.3.5.1.1. By Value
    • 10.3.5.2. Market Share & Forecast
      • 10.3.5.2.1. By Type
      • 10.3.5.2.2. By Application

11. Market Dynamics

• 11.1. Drivers
• 11.2. Challenges

12. Market Trends & Developments

• 12.1. Merger & Acquisition (If Any)
• 12.2. Product Launches (If Any)
• 12.3. Recent Developments

13. Company Profiles

• 13.1. Blue Energy Co., Ltd.
  • 13.1.1. Business Overview
  • 13.1.2. Key Revenue and Financials
  • 13.1.3. Recent Developments
  • 13.1.4. Key Personnel/Key Contact Person
  • 13.1.5. Key Product/Services Offered
• 13.2. Korea Electric Power Corporation (KEPCO)
• 13.3. SK Innovation Co., Ltd.
• 13.4. POSCO Holdings Inc.
• 13.5. Samsung SDI Co., Ltd.
• 13.6. Hyundai Electric & Energy Systems Co., Ltd.
• 13.7. Korea Institute of Energy Research (KIER)
• 13.8. Korea Advanced Institute of Science and Technology (KAIST)
• 13.9. Aqua Power Systems Inc.
• 13.10. LG Energy Solution Ltd.

14. Strategic Recommendations

15. About Us & Disclaimer