journal article·2024-03

Dendrite‐Free and High‐Rate Potassium Metal Batteries Sustained by an Inorganic‐Rich SEI

Xueyu Lian, Zhijin Ju, Lin Li, Yuyang Yi, Junhua Zhou, Ziang Chen, Yu Zhao, Zhengnan Tian, Yiwen Su, Zaikun Xue, Xiaopeng Chen, Yifan Ding, Xinyong Tao, Jingyu Sun

Advanced Materials· Volume 36· Issue 9
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Abstract

Abstract Potassium metal battery is an appealing candidate for future energy storage. However, its application is plagued by the notorious dendrite proliferation at the anode side, which entails the formation of vulnerable solid electrolyte interphase (SEI) and non‐uniform potassium deposition on the current collector. Here, this work reports a dual‐modification design of aluminum current collector to render dendrite‐free potassium anodes with favorable reversibility. This work achieves to modulate the electronic structure of the designed current collector and accordingly attain an SEI architecture with robust inorganic‐rich constituents, which is evidenced by detailed cryo‐EM inspection and X‐ray depth profiling. The thus‐produced SEI manages to expedite ionic conductivity and guide homogeneous potassium deposition. Compared to the potassium metal cells assembled using typical aluminum current collector, cells based on the designed current collector realize improved rate capability (maintaining 400 h under 50 mA cm−2) and low‐temperature durability (stable operation at −50 °C). Moreover, scalable production of the current collector allows for the sustainable construction of high‐safety potassium metal batteries, with the potential for reducing the manufacturing cost.
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Research context

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

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

Affiliations

College of Energy Soochow Institute for Energy and Materials Innovations SUDA‐BGI Collaborative Innovation Center Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 P. R. China

College of Materials Science and Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China

Institute for Carbon Neutralization College of Chemistry and Materials Engineering Wenzhou University Wenzhou 325035 P. R. China

Department of Industrial and Systems Engineering Hong Kong Polytechnic University Hong Kong 999077 P. R. China

School of Fashion and Textiles Hong Kong Polytechnic University Hong Kong 999077 P. R. China

College Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal 23955–6900 Saudi Arabia

Beijing Graphene Institute Beijing 100095 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Science Fund for Distinguished Young Scholars of Jiangsu Province

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