Issue 11, 2019

Construction of unique heterogeneous cobalt–manganese oxide porous microspheres for the assembly of long-cycle and high-rate lithium ion battery anodes

Abstract

Porous (Co, Mn)(Co, Mn)2O4-based microspheres (CM-11-Ms) and core–shell microspheres (CM-11-CSMs) were firstly synthesized via controlled pyrolysis of CoMn-precursor microspheres at different temperatures under nitrogen. During pyrolysis of the CoMn-precursor, the carbon derived from hexamethylenetetramine and polyethylene glycol transforms part of (Co, Mn)(Co, Mn)2O4 into MnO and Co3O4. As an anode for lithium ion batteries, CM-11-Ms exhibits a specific capacity of 745 mA h g−1 after 650 cycles at 1 A g−1, while CM-11-CSMs exhibits an enhanced lithium storage capacity of 2175.8 mA h g−1 even after 1000 cycles at 1 A g−1 without an evident capacity decay. The improved electrochemical properties could be attributed to the unique core–shell structure that accommodates the volume expansion during cycling, the high-rate lithiation-induced reactivation, and the synergy effects among (Co, Mn)(Co, Mn)2O4, Co3O4, and MnO.

Graphical abstract: Construction of unique heterogeneous cobalt–manganese oxide porous microspheres for the assembly of long-cycle and high-rate lithium ion battery anodes

Supplementary files

Article information

Article type
Paper
Submitted
16 sep 2018
Accepted
07 feb 2019
First published
08 feb 2019

J. Mater. Chem. A, 2019,7, 6149-6160

Construction of unique heterogeneous cobalt–manganese oxide porous microspheres for the assembly of long-cycle and high-rate lithium ion battery anodes

B. Wu, Y. Xie, Y. Meng, C. Qian, Y. Chen, A. Yuan, X. Guo, H. Yang, S. Wan and S. Lin, J. Mater. Chem. A, 2019, 7, 6149 DOI: 10.1039/C8TA09028A

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