Development of Microstrain in Aged Lithium Transition Metal Oxides

Title
Development of Microstrain in Aged Lithium Transition Metal Oxides
Author
선양국
Keywords
Coprecipitation; Micro-Strain; Ni Rich; Cathode; Lithium; Battery
Issue Date
2014-08
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, 2014, 14(8), p.4873-4880
Abstract
Cathode materials with high energy density for lithium-ion batteries are highly desired in emerging applications in automobiles and stationary energy storage for the grid. Lithium transition metal oxide with concentration gradient of metal elements inside single particles was investigated as a promising high-energy-density cathode material. Electrochemical characterization demonstrated that a full cell with this cathode can be continuously operated for 2500 cycles with a capacity retention of 83.3%. Electron microscopy and high-resolution X-ray diffraction were employed to investigate the structural change of the cathode material after this extensive electrochemical testing. It was found that microstrain developed during the continuous charge/discharge cycling, resulting in cracking of nanoplates. This finding suggests that the performance of the cathode material can be further improved by optimizing the concentration gradient to minimize the microstrain and to reduce the lattice mismatch during cycling.
URI
https://pubs.acs.org/doi/10.1021/nl5022859http://hdl.handle.net/20.500.11754/47157
ISSN
1530-6984; 1530-6992
DOI
10.1021/nl5022859
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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