Micro/nanostructured MnCo2O4.5 anodes with high reversible capacity and excellent rate capability for next generation lithium-ion batteries

Wang，Bin2; Wang，Shifeng1; Tang，Yuanyuan3; Tsang，Chi Wing1; Dai，Jinchuan3; Leung，Michael K.H.4; Lu，Xiao Ying1

2019-10-15

10.1016/j.apenergy.2019.113452

APPLIED ENERGY   影响因子和分区

0306-2619

1872-9118

Lithium-ion batteries have already achieved great success in consumer electronics. However, the electrochemical characteristics of the existing electrodes have constrained their widespread applications in electric vehicles, which need technical demands of high energy density and fast charging. Thus, it is highly desirable to explore high-performance electrodes with high reversible capacity and excellent rate capability. In this study, micro/nanostructured MnCoO anodes were synthesized by hydrothermal treatment with the presence of positively charged poly(diallyldimethylammonium chloride). Physicochemical property studies suggested that the as-prepared MnCoO of 2–5 µm in diameter was mainly composed of numerous nanoneedles, which were further comprised of many inter-connected nanoparticles. Also, poly(diallyldimethylammonium chloride) played the key roles as morphology controlling agent for the formation of the unusual MnCoO crystal phase. The unique properties of micro/nanostructured MnCoO including multi-scale dimensions, mesoporous structure, and multivalent states guaranteed the superior electrochemical characteristics in the repeated charge-discharge cycles. When evaluated as anodes for electrochemical lithium storage, high reversible capacity and good cycling performance were demonstrated with a current density of 500 mA g over 200 cycles. Even when tested at relatively high current densities of 1000, 2000 and 3000 mA g, the average reversible capacities were also achieved at about 1441, 1213 and 966 mAh g, respectively. The achieved electrochemical characteristics of MnCoO anodes were proved to be better than many binary transition metal oxides or comparable with high-capacity Si-based anodes. Overall, this study demonstrated micro/nanostructured MnCoO as potential high-performance anodes for practical applications of next generation lithium-ion batteries.

Electrochemistry High capacity Lithium-ion battery anodes Micro/nanostructures MnCo2O4.5

SCI ; EI

英语

其他

Hong Kong Competitive Research Funding for Faculty Development Scheme[UGC/FDS25/E07/16]

Energy & Fuels ; Engineering

Energy & Fuels ; Engineering, Chemical

WOS:000497968000050

ELSEVIER SCI LTD

20192507059694

Anodes ; Charging (batteries) ; Chlorine compounds ; Cobalt compounds ; Electric discharges ; Electrochemical electrodes ; Electrochemistry ; Ions ; Manganese compounds ; Physicochemical properties ; Transition metal oxides ; Transition metals

Metallurgy and Metallography:531 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Electrochemistry:801.4.1

ENGINEERING

2-s2.0-85067211568

Scopus

1.Faculty of Science and TechnologyTechnological and Higher Education Institute of Hong Kong,Hong Kong
2.Hong Kong Applied Science and Technology Research Institute,Hong Kong
3.School of Environmental Science and EngineeringSouthern University of Science and Technology,Shenzhen,China
4.Ability R&D Energy Research CentreSchool of Energy and EnvironmentCity University of Hong Kong,Hong Kong

Wang，Bin,Wang，Shifeng,Tang，Yuanyuan,et al. Micro/nanostructured MnCo2O4.5 anodes with high reversible capacity and excellent rate capability for next generation lithium-ion batteries[J]. APPLIED ENERGY,2019,252.

Wang，Bin.,Wang，Shifeng.,Tang，Yuanyuan.,Tsang，Chi Wing.,Dai，Jinchuan.,...&Lu，Xiao Ying.(2019).Micro/nanostructured MnCo2O4.5 anodes with high reversible capacity and excellent rate capability for next generation lithium-ion batteries.APPLIED ENERGY,252.

Wang，Bin,et al."Micro/nanostructured MnCo2O4.5 anodes with high reversible capacity and excellent rate capability for next generation lithium-ion batteries".APPLIED ENERGY 252(2019).