DataVXAdvanced MaterialsPaper
journal article·2024-07

A Membrane‐Free Rechargeable Seawater Battery Unlocked by Lattice Engineering

Wei Wen, Chao Geng, Xinran Li, Hongpeng Li, Jin‐Ming Wu, Hisayoshi Kobayashi, Tulai Sun, Zhenyu Zhang, Dongliang Chao

Advanced Materials· Volume 36· Issue 30
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Source abstract

Abstract

Abstract Seawater batteries that directly utilize natural seawater as electrolytes are ideal sustainable aqueous devices with high safety, exceedingly low cost, and environmental friendliness. However, the present seawater batteries are either primary batteries or rechargeable half‐seawater/half‐nonaqueous batteries because of the lack of suitable anode working in seawater. Here, a unique lattice engineering to unlock the electrochemically inert anatase TiO2 anode to be highly active for the reversible uptake of multiple cations (Na+, Mg2+, and Ca2+) in aqueous electrolytes is demonstrated. Density functional theory calculations further reveal the origin of the unprecedented charge storage behaviors, which can be attributed to the significant reduction of the cations diffusion barrier within the lattice, i.e., from 1.5 to 0.4 eV. As a result, the capacities of anatase TiO2 with 2.4% lattice expansion are ≈100 times higher than the routine one in natural seawater, and ≈200 times higher in aqueous Na+ electrolyte. The finding will significantly advance aqueous seawater energy storage devices closer to practical applications.
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Research context

Energy storage

OpenAlex topics: Advanced battery technologies research · Advancements in Battery Materials · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Mechanical and Electrical Engineering Collaborative Innovation Center of Ecological Civilization Hainan University Haikou 570228 China

Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, School of Chemistry and Materials Fudan University Shanghai 200433 China

State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

Department of Chemistry and Materials Technology Kyoto Institute of Technology Kyoto 606‐8585 Japan

Center for Electron Microscopy State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China

Key Laboratory for Precision and Non‐Traditional Machining Technology of Ministry of Education Dalian University of Technology Dalian 116024 China

Funding

National Natural Science Foundation of China

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