Enhanced electrochemical performance of Li1.2Ni0.13Co0.13Mn0.54O2 composited with Ti3C2Tx MXene nanosheets
- 75 Downloads
Li1.2Ni0.13Co0.13Mn0.54O2/Ti3C2Tx (LMR/TC) composite materials have been synthesized through mixing LMR particles with TC nanosheets. SEM result shows that most LMR particles are anchored on the surface of the Ti3C2Tx nanosheets. Such a structure can short the diffusion pathway for both the electron and lithium ions, enhancing electronic and ionic conductivities. Meanwhile, the composite structure keeps much stable during charge/discharge processes, leading to an enhanced cycling performance of the cathode. The LMR/TC (5 wt% Ti3C2Tx) composite electrode delivers an initial discharge capacity of 279.9 mA h g−1 at 0.1 C with coulombic efficiency of 81.8% and the capacity can maintain 248 mA h g−1 after 100 cycles with capacity retention of 85.7%. In contrast, the initial coulombic efficiency and the capacity retention after 100 cycles at same conditions of the pristine LMR electrode are only 67.1% and 67.6%, respectively. The composited cathode also shows an enhanced rate capacity compared to the pristine LMR.
KeywordsLi1.2Ni0.13Co0.13Mn0.54O2 Ti3C2Tx nanosheets Composite structure Capacity retention
This work is supported by the National Key Research and Development Program under Contract No. 2017YFA0402800 and the National Natural Science Foundation of China under Contract Nos. U1732160 and 11504380.
- 33.Yu R, Zhang Z, Jamil S, Chen J, Zhang X, Wang X, Yang Z, Shu H, Yang X (2018) Effects of nanofiber architecture and antimony doping on the performance of lithium-rich layered oxides: enhancing lithium diffusivity and lattice oxygen stability. ACS Appl Mater Interfaces 10(19):16561–16571CrossRefGoogle Scholar