A Blockchain Synergy in Conductive Polymer-Filled Metal-Organic Frameworks for Dendrite-Free Li Plating/Stripping with High Coulombic Efficiency

【Author】 Ma, Yong; Wei, Le; He, Ying; Yuan, Xuzhou; Su, Yanhui; Gu, Yuting; Li, Xinjian; Zhao, Xiaohui; Qin, Yongze; Mu, Qiaoqiao; Peng, Yang; Sun, Yang; Deng, Zhao

【Source】ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

【影响因子】16.823

【Abstract】The performance of lithium-metal batteries is severely hampered by uncontrollable dendrite growth and volume expansion on the metal anodes. Inspired by the blockchain concept in data mining, here we utilize a conductive polymer-filled metal-organic framework (MOF) as the lithium host, in which polypyrrole (PPy) serves as the chain to interlink Li blocks stored in the MOF pores. While the N-rich PPy guides fast Li+ infiltration/extrusion and serves as the nucleation sites for isotropic Li growth, the MOF pores compartmentalize bulk Li deposition for 3D matrix Li storage, leading to low-barrier and dendrite-free Li plating/stripping with superb Coulombic efficiency. The as-fabricated lithium-metal anodes operate over 700 cycles at 5 mA cm(-2) in symmetric cells, and 800 cycles at 1 C in full cells with a per-cycle capacity loss of only 0.017 %. This work might open a new chapter for Li-metal anode construction by introducing the concept of blockchain management of Li plating/stripping.

【Keywords】Blockchain; Dendrite-Free; Lithium Metal Anodes; MOFs; Polypyrrole

【发表时间】

【收录时间】2022-01-30

【文献类型】期刊

【主题类别】

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