塩水からリチウムの抽出は,分離され,膜のない電気化学的セル設計によって行われます

Zhen Li¹, I-Chun Chen¹, Li Cao¹

¹Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.

Science (New York, N.Y.)

|September 26, 2024

まとめ

リチウムの効率的な抽出は持続可能なエネルギー貯蔵に不可欠ですこの研究は,高純度リチウム炭酸の生産のための新しい電気化学セルを提示し,エネルギーを節約し,挑戦的な源から高い回収率を達成します.

科学分野:

電気化学
材料科学
持続可能なエネルギー

背景:

リチウムイオン電池はエネルギー貯蔵に不可欠ですが持続可能なリチウム調達は課題です
高マグネシウム/リチウムの比率を持つ硬い塩水は豊富ですが,リチウムの処理は困難です.
現在のリチウム抽出方法は非効率で環境に悪影響を及ぼします

研究の目的:

硬い塩水からリチウムを抽出するための効率的でスケーラブルな方法を開発する.
バッテリー製造に適した高純度リチウム炭酸を生産する.
リチウムベースのエネルギー貯蔵システムの持続性を高める.

主な方法:

分離された,膜のない電気化学的セル設計が採用された.
セルには鉄酸塩電極と塩水/淡水隔離室が使用されています.
シルバー/シルバーハリド・リドックス電極は電気化学的接続を容易にする.

主要な成果:

塩塩はMg/Li比が3258に達し,Li濃度は0.15mMまで低下した.
バッテリーグレードのリチウム炭酸 (純度99.95%) が生産された.
オスモティックエネルギーを集約することで,約21.5%のエネルギー節約が達成されました.
パイロットスケールのセルでは,死海塩水から84.0%のリチウム回収率を示した.

結論:

開発された電気化学電池は,困難な塩水からリチウムを抽出するための効率的で持続可能な経路を提供します.
この技術は,成長するエネルギー貯蔵市場の安定した高純度リチウム供給に大きく貢献します.
オスモティックエネルギー収集を統合することで,リチウム生産の経済的実用性と環境的なプロフィールが向上します.

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