Advanced Li-Rich Cathode Collaborated with Graphite/Silicon Anode for High Performance Li-Ion Batteries in Half and Full Cells

Yanling Huang, Xianhua Hou, Xiaoying Fan, Shaomeng Ma, Shejun Hu, Kwok Ho Lam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

A high performance surface modified Li1.2Mn0.534Ni0.133Co0.133O2cathode with graphene and CNTs (GNL-modified LMNCO) has been synthesized via a simple ultrasonic dispersion approach. Its morphology and electrochemical performance are investigated thoroughly in this work. Typically, the GNL-modified LMNCO demonstrates an initial discharge capacity of 285.8 mAh g-1, showing initial coulombic efficiency of 83.3%. In addition, impressive discharge capacity of 162.3 and 123.5 mAh g-1are obtained at 5 and 10 C, respectively. More satisfactorily, it reveals high capacity retention of 217.9 mAh g-1even after the 180th cycle. The extraordinary electrochemical performance of the GNL-modified LMNCO can be ascribed to the unique conducting network of graphene and CNTs coating on the particles, which greatly improves the conductivity of the electrode and enhances the diffusion coefficient of the Li+. Most significantly, a high-voltage and high-power electrochemical energy storage devices of lithium-ion battery (LIB) full cell has been simultaneously assembled with the GNL-modified LMNCO as cathode and silicon/graphite/amorphous carbon (Si/C) composite as anode, whose properties outclass many other systems of LIB full cells. Therefore, the acquaintance of the compatibility of the Li-rich cathode and Si/C composite anode for high-voltage and high-energy LIB full cells should attract more research efforts in the future.
Original languageEnglish
Pages (from-to)1175-1187
Number of pages13
JournalElectrochimica Acta
Volume182
DOIs
Publication statusPublished - 10 Nov 2015

Keywords

  • Cathode material
  • Full cells
  • Li Mn Ni Co O 1.2 0.534 0.133 0.133 2
  • Lithium-ion batteries

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

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