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Tailoring carboxyl tubular carbon nanofibers/MnO 2 composites for high‐performance lithium‐ion battery anodes
Author(s) -
Huyan Yu,
Chen Junjie,
Yang Ke,
Zhang Qiuyu,
Zhang Baoliang
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17546
Subject(s) - anode , materials science , nanosheet , electrochemistry , electrode , hydrothermal circulation , lithium (medication) , phase (matter) , chemical engineering , battery (electricity) , lithium ion battery , nanofiber , carbon fibers , crystal (programming language) , composite material , nanotechnology , chemistry , composite number , organic chemistry , medicine , power (physics) , physics , computer science , engineering , programming language , quantum mechanics , endocrinology
Three kinds of novel carboxyl modification tubular carbon nanofibers (CMTCFs) and MnO 2 composites materials (CMTCFs/MnO 2 ) are prepared by combining hyper‐crosslinking, liquid phase oxidation and hydrothermal technology. The complex morphology and crystal phase of MnO 2 in CMTCFs/MnO 2 are effectively regulated by adjusting the hydrothermal reaction time. The δ‐MnO 2 nanosheet‐wrapped CMTCFs (CMTCFs@MNS) are used as anode and compared with the other two CMTCFs/MnO 2 . Electrochemical analysis shows that CMTCFs@MNS electrode exhibits a large reversible capacity of 1497.1 mAh g −1 after 300 cycles at 1000 mA g −1 and a long cycling reversible capacity of 400.8 mAh g −1 can be maintained after 1000 cycles at 10 000 mA g −1 . CMTCFs@MNS manifests an average reversible capacity of 256.32 mAh g −1 at 10 000 mA g −1 after twelve changes in current density. In addition, the structural superiority of CMTCFs@MNS electrode is clarified by characterizing the microscopic morphology and crystal phase of the electrode after electrochemical performance test.