Encapsulating manganese oxide nanoparticles within conducting polypyrrole via in situ redox reaction and oxidative polymerization for long-life lithium-ion batteries

作     者：He-Liang Yao Shan-Shan Gao Zheng-Qian Fu Wei-Chao Bao Zhong-Hui Cui Yi-Qiu Li Fang-Fang Xu He-Liang Yao;Shan-Shan Gao;Zheng-Qian Fu;Wei-Chao Bao;Zhong-Hui Cui;Yi-Qiu Li;Fang-Fang Xu

作者机构：State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第9期

页      面：2415-2423页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0806[工学-冶金工程] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51702346 and 51772314) the Natural Science Foundation of Shanghai(No.17ZR1434600) Shanghai Technical Platform for Testing and Characterization on Inorganic Materials(No.19DZ2290700) 

主　　题：Manganese oxide Polypyrrole High cycling performance Lithium-ion battery 

摘      要：Manganese oxides(MnO_(x)) have been extensively investigated due to their extremely high theoretical capacities for application as conversion anodes in lithiumion batteries. However, fully performing their theoretical performance still faces poor electric conductivity and serious volume change upon lithium insertion/***, we demonstrate encapsulating manganese oxide nanoparticles within a conducting polymer polypyrrole(PPy) shell as a facile strategy to overcome such flaws through in situ redox reaction and oxidative polymerization process. Such an in situ method combines the redox reaction between potassium permanganate and tetrahydrofuran to form MnO_(x)nanoparticles and the subsequent oxidative polymerization of pyrrole to form a conductive polypyrrole coating shell by the oxidant KMnO_(4) into one step. For the as-fabricated products(MnO_(x)@PPy), this tenderly introduced conductive PPy shell highly favors the fast electron transfer and preserves the electrode structure integrity upon repeated cycling. As the anode for LIBs, MnO_(x)@PPy exhibits superior lithium storage performance with a high reversible capacity(1538 mAh·g^(-1)), long-life cyclability(747 mAh·g^(-1) after 1000 cycles at 1.0 C) and durable ratability(574 mAh·g^(-1) at 2.0 C). This work demonstrates that the convenient in situ strategy to form conductive polymer coating shell is effective to improve the performance of conversion anodes and can be extended to other materials for energy storage applications.