Tape-casting electrode architecture permits low-temperature manufacturing of all-solid-state thin-film microbatteries
Bingyuan Ke , Congcong Zhang , Shoulin Cheng , Wangyang Li , Renming Deng , Hong Zhang , Jie Lin , Qingshui Xie , Baihua Qu , Dong-Liang Peng , Xinghui Wang
Interdisciplinary Materials ›› 2024, Vol. 3 ›› Issue (4) : 621 -631.
Tape-casting electrode architecture permits low-temperature manufacturing of all-solid-state thin-film microbatteries
Along with the constantly evolving functional microsystems toward more diversification, the more rigorous design deliberation of pursuing higher mass-loading of electrode materials and low-temperature fabrication compatibility have imposed unprecedented demand on integrable all-solid-state thin-film microbatteries. While the classic thin-film intercalation cathode prepared by vacuum-based techniques inevitably encountered a post-annealing process, tape-casting technologies hold great merits both in terms of high-mass loading and low-temperature processing. In this work, a novel microbattery configuration is developed by the combination of traditional tape-casting thick electrodes and sputtered inorganic thin-film solid electrolytes (∼3 µm lithium phosphorus oxynitride). Enabled by physically pressed or vapor-deposited Li as an anode, solid-state batteries with tape-casted LiFePO4 electrodes exhibit outstanding cyclability and stability. To meet integration requirements, LiFePO4/LiPON/Si microbatteries were successfully fabricated at low temperatures and found to achieve a wide operating temperature range. This novel configuration has good prospects in promoting the thin-film microbattery enabling a paradigm shift and satisfying diversified requirements.
all-solid-state batteries / lithium phosphorus oxynitride / on-chip integration / silicon anodes / tape-casting electrodes
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2024 The Authors. Interdisciplinary Materials published by Wuhan University of Technology and John Wiley & Sons Australia, Ltd.
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