New Insights into Improving Rate Performance of Lithium-Rich Cathode Material

Yongqing Wang; Zhenzhong Yang; Yumin Qian; Lin Gu; Haoshen Zhou

doi:10.1002/adma.201500956

New Insights into Improving Rate Performance of Lithium-Rich Cathode Material

Adv Mater. 2015 Jul 8;27(26):3915-20. doi: 10.1002/adma.201500956. Epub 2015 May 21.

Authors

Yongqing Wang¹, Zhenzhong Yang^{2

3}, Yumin Qian¹, Lin Gu^{2

3}, Haoshen Zhou¹

Affiliations

¹ National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan.
² Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
³ Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China.

PMID: 25996646
DOI: 10.1002/adma.201500956

Abstract

A Sn doping strategy is demonstrated to improve lithium diffusion kinetics by expanding the spacing of (003) planes without destroying the layered structure. A large (003) spacing will significantly decrease the energy barrier associated with lithium diffusion. Besides better rate capability, the Sn-doped material exhibits an unexpected much improved capacity above 3.0 V (vs Li(+) /Li), which is highly desired in future applications.

Keywords: cathodes; doping; layered structures; lithium-ion batteries.