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- Title
Binary Cobalt-Free Blended Oxide Cathodes for Cost-Effective Lithium-Ion Batteries.
- Authors
Bao, Jian; Lu, Chengwei; Zhang, Wenkui; Han, Yiyao; Zhou, Xiaozheng; Wang, Guoguang; Mao, Qinzhong; Wang, Chen; Wan, Wangjun; Xia, Yang
- Abstract
Owing to the high specific capacity and cost-effectiveness, cobalt-free high-nickel cathode materials (LiNixMn1−xO2, x > 0.5) are widely used in lithium-ion batteries for various electronic equipment and energy storage systems. However, their unsatisfactory electrochemical performance and relatively high cost still limit the large-scale application of LiNixMn1−xO2 cathodes. Herein, we propose a series of blended LiNi0.6Mn0.4O2(NM64)/LiMn2O4(LMO) cathode materials synthesized by a simple mechanical mixing method to significantly reduce the cathode material cost, as well as to ameliorate the cycling life span and rate ability. It is demonstrated that this feasible and economic blending strategy fully exploits the advantages of high-specific-capacity NM64 with a layered structure and low-cost LMO with a spinel structure, which could effectively compensate for the inferior rate performance of NM64 and the poor cycling performance of LMO. Specifically, when the mass ratio of NM64 to LMO is 85:15, the NM64 and LMO particles not only uniformly fill their respective inter-particle gaps, effectively increasing the compaction density of the binary blended materials, but also exhibit comprehensively enhanced electrochemical properties in terms of high specific capacity (154.29 mA h g−1 at the first cycle), long cycling life span (79.7% at 0.2C after 100 cycles), and excellent rate performance (70.70 mA h g−1 at 2C). Such ingeniously designed cobalt-free oxides cathode will pave the new avenue in the sustainable development of economical oxides cathodes for high-performance lithium-ion batteries.
- Subjects
LITHIUM-ion batteries; ENERGY storage; ENERGY storage equipment; GRAPHITIZATION; ELECTRONIC equipment; COBALT; LIFE spans
- Publication
Journal of Electronic Materials, 2023, Vol 52, Issue 11, p7256
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-023-10639-9