期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 33, 页码 27618-27624出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b05868
关键词
LiMnPO4 cathode; self-assembly; microcluster; improved electronic conductivity; carbon coating; lithium-ion battery
资金
- National Key R&D Program of China [2016YFA0201100]
- National Natural Science Foundation of China [21601083]
- Natural Science Foundation of Jiangsu Province [BK20160614]
A novel structure of a carbon-coated LiMnPO4 microcluster through emulsion-based self-assembly has been fabricated to yield a high-performance battery cathode. In this rational design, nanosized LiMnPO4 plates are assembled into microclusters to achieve a dense packing and robust interparticle contact. In addition, the conductive carbon framework wrapping around these clusters functions as a fast electron highway, ensuring the high utilization of the active materials. The designed structure demonstrates enhanced specific capacity and cycling stability in lithium-ion batteries, delivering a discharge capacity of 120 mAh g(-1) after 200 cycles at 0.2 C. It also shows a superior rate capability with discharge capacities of 139.7 mAh g(-1) at 0.05 C, 131.7 mAh g(-1) at 0.1 C, and 99.2 mAh g(-1) at 1 C at room temperature.
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