A high energy density full lithium-ion cell based on specially matched coulombic efficiency. Issue 11 (24th February 2016)

• Record Type: Journal Article
• Authors: Zou, Bangkun; Hu, Qiao; Qu, Danqi; Yu, Ran; Zhou, Yuting; Tang, Zhongfeng; Chen, Chunhua
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 11(2016)
• Page Start: 4117
• Page End: 4124
• Publication Date: 2016-02-24
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta00069j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Li-rich cathodes and Mn x Co1− x O anodes are selected to construct a full-cell by specially matched coulombic efficiency, which delivers particularly high energy density. Abstract : Nano-spherical Li-rich cathodes and Mn x Co1− x O anodes are synthesized from as-solvothermal Mn x Co1− x CO3 ( x = 1, 0.8, and 0.5) precursors. Based on the half-cell studies of these materials, Li-rich 0.5Li2 MnO3 ·0.5LiMn0.5 Ni0.5 O2 with a high reversible capacity of 247 mA h g −1 and binary transition metal oxide Mn0.8 Co0.2 O with a reversible capacity of 759 mA h g −1 are selected respectively as the optimal positive and negative electrodes to construct a full cell. Such an electrode match-up, i.e. Li-rich/Mn0.8 Co0.2 O full cell ("N-cell"), allows no need for pre-activation of the metal oxide anode. This "N-cell" can deliver a high reversible capacity of 205 mA h g −1 and particularly rather high volumetric energy density, which is about 31% higher than that of a Li-rich/graphite full cell ("T-cell"). The special coulombic efficiency match-up and tailored microstructures and compositions of the electrode materials are all crucial to achieve such a high energy density.