期刊
JOURNAL OF POWER SOURCES
卷 378, 期 -, 页码 677-684出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.01.029
关键词
NiMn2O4; Graphene; Nanocomposite; Lithium ion battery; Anode
资金
- National Natural Science Foundation of China [21471005, 61203212]
A sandwich-structured NiMn2O4@reduced graphene oxide (NiMn2O4@rGO) nanocomposite consisting of ultrathin NiMn2O4 sheets uniformly anchored on both sides of a three-dimensional (3D) porous rGO is presented. The NiMn2O4@rGO nanocomposites prepared through a dipping process combining with a hydrothermal method show a good electrochemical performance including a high reversible capability of 1384 mAh g(-1) at 1000 mA g(-1) over 1620 cycles, and an superior rate performance. Thus, a full cell consisting of a commercial LiCoO2 cathode and the NiMn2O4@rGO anode delivers a stable capacity of about 1046 mAh g(-1) (anode basis) after cycling at 50 mA g(-1) for 60 times, It is demonstrated that the 3D porous composite structure accommodates the volume change during the Li+ insertion/extraction process and facilitates the rapid transport of ions and electrons. The high performance would enable the presented NiMn2O4@rGO nanocomposite a promising anode candidate for practical applications in Li-ion batteries.
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