KCoxMn1-x[Fe(CN)6]/Carbon nanotube composite as high capacity anode for Li-ion batteries

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 887; p. 115151
• Main Authors: Chen, Yao, Zhou, Run-Chao, Wan, Yong-Hua, Hao, Jun-Wei, You, Hai-Rui, Liu, Xiao-Min, Yang, Hui
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.04.2021; Elsevier Science Ltd
• Subjects: Anode; Anodes; Carbon nanotube; Carbon nanotubes; Charge transfer; Chemical precipitation; Cobalt; Electrochemical analysis; Electrode materials; Flux density; Iron; Lithium; Lithium battery; Lithium-ion batteries; Pigments; Prussian blue; Rechargeable batteries; Carbon nanotube; Lithium battery; Prussian blue; Anode
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2021.115151

[Display omitted] •CoMnHCF/CNT is prepared by co-precipitation method with an improved conductivity.•CoMnHCF/CNT delivers superior cycling performance and rate capacity as anode material for LIBs.•Ex-situ XRD is carried out to explore the redox mechanism of CoMnHCF during cycling. To explore inexpensive electrode materials with high energy density is urgent for developing next generation Li-ion batteries (LIBs). In this paper, a multi-metal Prussian blue analogue composited with carbon nanotube (KCoxMn1-x[Fe(CN)6]/CNT), synthesized via a simple solution precipitation method, is employed as the anode for LIBs, which exhibits superior electrochemical performance. When cycled at 0.1 A g−1, it delivers the reversible capacity up to 727.5 mA h g−1 during initial de-lithiation. In addition, this material presents excellent rate capability, yielding 452.3 and 408.7 mA h g−1 at 1 and 2 A g−1, respectively. The improved performance may be associated with the effective connection between CNT and CoMnHCF particles to enhance the charge-transfer kinetics and lower the electrical resistance. Regarding the charge/discharge mechanism, the full reduction of Co2+, Mn2+ and Fe2+ in the initial lithiation process and the redox of Fe2O3/Fe0, CoO/Co0, MnO/Mn0 in the subsequent cycles is proposed.