Hierarchical porous onion-shaped LiMn2O4 as ultrahigh-rate cathode material for lithium ion batteries

Content Provider	Semantic Scholar
Author	Li, Zihe Feng, Xiangming Mi, Liwei Zheng, Jinyun Chen, Xiaoyang Chen, Weihua
Copyright Year	2018
Abstract	Spinel LiMn2O4 is a widely utilized cathode material for Li-ion batteries. However, its applications are limited by its poor energy density and power density. Herein, a novel hierarchical porous onion-like LiMn2O4(LMO) was prepared to shorten the Li+ diffusion pathway with the presence of uniform pores and nanosized primary particles. The growth mechanism of the porous onion-like LiMn2O4 was analyzed to control the morphology and the crystal structure so that it forms a polyhedral crystal structure with reduced Mn dissolution. In addition, graphene was added to the cathode (LiMn2O4/graphene) to enhance the electronic conductivity. The synthesized LiMn2O4/graphene exhibited an ultrahigh-rate performance of 110.4 mAh·g–1 at 50 C and an outstanding energy density at a high power density, maintaining 379.4 Wh·kg–1 at 25,293 W·kg–1. Besides, it shows durable stability, with only 0.02% decrease in the capacity per cycle at 10 C. Furthermore, the (LiMn2O4/graphene)/graphite full-cell exhibited a high discharge capacity. This work provides a promising method for the preparation of outstanding, integrated cathodes for potential applications in lithium ion batteries.
Starting Page	4038
Ending Page	4048
Page Count	11
File Format	PDF HTM / HTML
DOI	10.1007/s12274-018-1986-z
Volume Number	11
Alternate Webpage(s)	https://page-one.springer.com/pdf/preview/10.1007/s12274-018-1986-z
Alternate Webpage(s)	https://static-content.springer.com/esm/art:10.1007%2Fs12274-018-1986-z/MediaObjects/12274_2018_1986_MOESM1_ESM.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s12274-018-1986-z
Journal	Nano Research
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article