文献类型：期刊文献

英文题名：Rational Design of MnO/Carbon Nanopeapods with Internal Void Space for High-Rate and Long-Life Li-Ion Batteries

作者：Jiang, Hao[1];Hu, Yanjie[1];Guo, Shaojun[2];Yan, Chaoyi[3];Lee, Pooi See[3];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Los Alamos Natl Lab, Los Alamos, NM 87545 USA;[3]Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

年份：2014

卷号：8

期号：6

起止页码：6038

外文期刊名：ACS NANO

收录：;EI(收录号：20142717901089);WOS:【SCI-EXPANDED(收录号:WOS:000338089200068)】；

基金：This work was supported by the National Natural Science Foundation of China (21136006, 21206043, 21236003), the Research Project of Chinese Ministry of Education (113026A), the Shanghai Pujiang Program (12PJ1401900), the Shanghai Rising-Star Program (13QA1401100), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Fundamental Research Funds for the Central Universities, and J. Robert Oppenheimer distinguished fellowship.

语种：英文

外文关键词：MnO nanowire; nanopeapod; lithium ion battery; heterostructure; anode material

摘要：Searching the long-life MnO-based materials for lithium ion batteries (LIBs) is still a great challenge because of the issue related to the volumetric expansion of MnO nanoparticles (NPs) or nanowires (NWs) during lithiation. Herein, we demonstrate an unexpected result that a peapod-like MnO/C heterostructure with internal void space can be facilely prepared by annealing the MnO precursor (MnO-P) NW/polydopamine core/shell nanostructure in an inert gas, which is very different from the preparation of typical MnO/C core/shell NWs through annealing MnO NW/C precursor nanostructure. Such peapod-like MnO/C heterostructure with internal void space is highly particular for high-performance LIBs, which can address all the issues related to MnO dissolution, conversion, aggregation and volumetric expansion during the Li+ insertion/extraction. They are highly stable anode material for LIBs with a very high reversible capacity (as high as 1119 mAh g(-1) at even 500 mA g(-1)) and fast charge and discharge capability (463 mAh g(-1) at 5000 mA g(-1)), which is much better than MnO NWs (38 mAh g(-1) at 5000 mA g(-1)) and MnO/C core/ shell NWs (289 mAh g(-1) at 5000 mA g(-1)). Such nanopeapods also show excellent rate capability (charged to 91.6% in 10.6 mm using the constant current mode). Most importantly, we found that MnO/C nanopeapods show no capacity fading even after 1000 cycles at a high current density of 2000 mA g(-1), and no morphology change. The present MnO/C nanopeapods are the most efficient MnO-based anode materials ever reported for LIBs.