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A high-durability aqueous Cu-S battery assisted by pre-copper electrochemistry

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摘要 Although research interest in aqueous metal-sulfur batteries(AMSs)has surged due to their intrinsic low cost and high capacity,the practical application of AMSs remains a considerable challenge because of the restrictive cycling stability.To circumvent this issue,we propose an innovative and simple pre-copper strategy to realize a high-durability aqueous Cu-S battery.The precopper strategy can effectively promote a stable metal dissolution/deposition,compensate for charge carriers,and facilitate reaction kinetics during the subsequent process.As a result,the aqueous Cu-S battery when coupled with S-decorated porous Ti_(3)C_(2)(S-d-Ti_(3)C_(2))exhibits excellent electrochemical performance,delivering a highly reversible capacity of 1805.4 mAh·g^(-1)in the initial cycle at 0.8 A·g^(-1),impressive cycling stability with 90.2%capacity retention over 800 cycles,and ultralow polarization~0.08 V even at a high current density of 3.1 A·g^(-1).The findings obtained in this work could pave the way for the design of highperformance sulfur-based aqueous batteries,which fill the vacancy of the necessary metal anode,delivering merits in both cost and cycle life.
出处 《Nano Research》 SCIE EI CSCD 2023年第7期9553-9560,共8页 纳米研究(英文版)
基金 We appreciate support from the National Natural Science Foundation of China(Nos.22005315 and22179109) Central Universities Fundamental Research Funds(No.SWU-KR22002) Chongqing Natural Science Foundation(No.cstc2020jcyjzdxmX0010).
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