title: Layered Lithium-Rich Oxide Nanoparticles Doped with Spinel Phase: Acidic Sucrose-Assistant Synthesis and Excellent Performance as Cathode of Lithium Ion Battery.
abstract: Nanolayered lithium-rich oxide doped with spinel phase is synthesized by acidic sucrose-assistant sol-gel combustion and evaluated as the cathode of a high-energy-density lithium ion battery. Physical characterizations indicate that the as-synthesized oxide (LR-SN) is composed of uniform and separated nanoparticles of about 200 nm, which are doped with about 7% spinel phase, compared to the large aggregated ones of the product (LR) synthesized under the same condition but without any assistance. Charge/discharge demonstrates that LR-SN exhibits excellent rate capability and cyclic stability: delivering an average discharge capacity of 246 mAh g(-1) at 0.2 C (1C = 250 mA g(-1)) and earning a capacity retention of 92% after 100 cycles at 4 C in the lithium anode-based half cell, compared to the 227 mA g(-1) and the 63% of LR, respectively. Even in the graphite anode-based full cell, LR-SN still delivers a capacity of as high as 253 mAh g(-1) at 0.1 C, corresponding to a specific energy density of 801 Wh kg(-1), which are the best among those that have been reported in the literature. The separated nanoparticles of the LR-SN provide large sites for charge transfer, while the spinel phase doped in the nanoparticles facilitates lithium ion diffusion and maintains the stability of the layered structure during cycling.
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510631, China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510631, China.
authors.forename: Dongrui
authors.initials: D
authors.lastname: Chen
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510631, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Youhao
authors.initials: Y
authors.lastname: Liao
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510631, China.
authors.forename: Xiaoxin
authors.initials: X
authors.lastname: Zhong
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510631, China.|Engineering Research Center of MTEES (Ministry of Education), Research Center of BMET (Guangdong Province), Engineering Laboratory of OFMHEB (Guangdong Province), Key Laboratory of ETESPG (GHEI), and Innovative Platform for ITBMD (Guangzhou Municipality), South China Normal University , Guangzhou 510006, China.
authors.forename: Weishan
authors.initials: W
authors.lastname: Li
authors.affiliation: School of Chemistry and Environment, South China Normal University , Guangzhou 510631, China.
authors.forename: Yuegang
authors.initials: Y
authors.lastname: Zhang
keywords: cathode; layered lithium-rich oxide; lithium ion battery; nanoparticles; spinel phase doping