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Assembly of LiMnPO4 Nanoplates into Microclusters as a High-Performance Cathode in Lithium-Ion Batteries

Author:
Wang, Chao, Li, Shiheng, Han, Yuyao, Lu, Zhenda
Source:
ACS applied materials & interfaces 2017 v.9 no.33 pp. 27618-27624
ISSN:
1944-8252
Subject:
ambient temperature, carbon, cathodes, lithium batteries
Abstract:
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.
Agid:
5795627