Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 576, Issue -, Pages 176-185Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.05.017
Keywords
Sodium-ion batteries; Anode materials; N-doped carbon; Mixed transition-metal oxides; Long-cycle life
Categories
Funding
- National Natural Science Foundation of China [51671089, 21773093]
- Fund for Innovative Research Groups of the National Natural Science Foundation of China [51621001]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2017B030306004, 2015A030306014]
- Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme
- Guangdong Special Support Program [2017TQ04N224]
- Open Fund of the Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials [AESM201701]
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Volume expansion and poor conductivity result in poor cyclability and low rate capability, which are the major challenges of transition-metal oxide as anode materials for sodium-ion batteries (SIBs). Herein, N-doped carbon encapsulated CoMoO4 (CoMoO4@NC) nanorods are developed as excellent anode materials for SIBs with long-cycle life. The N-doped carbon shells serve as buffer to accommodate severe volume changes during sodiation/desodiation, and at the same time improve electronic conductivity and activate surface sites of CoMoO4. The optimized composite presents rapid reaction kinetics and excellent cycle stability. Even at a high current density of 1 A g(-1), it still shows long-cycle life and maintains specific capacity of 190 mAh g(-1) after 3200 cycles. Furthermore, CoMoO4@NC anode is applied to match with Na3V2(PO4)(3) cathode to assemble full-cells, in which it accomplishes reversible capacity of 152 mAh g(-1) after 100 cycles, with capacity retention of 75% at a current density of 1 A g(-1), highlighting the practical application for SIBs. (C) 2020 Elsevier Inc. All rights reserved.
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