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Stabilizing anionic redox processes in electrospun NiS2–based cathode towards durable aluminum-ion batteries

Li Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao|
Kwun Nam (56861786200) | Zongping (55904502000); Hui | Fuming (57193337129); Shao | Xi (57772427900); Chen | Duc Anh (55929952200); Fan | Chenyang (56002231000); Dinh | Kaixi (57223208342); Zha WA School of Mines: Minerals, Energy and Chemical Engineering (WASM-MECE), Curtin University, Perth, 6845, WA, Australia| Shunping (56879708700); Wang Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, 510006, China| Yunshan (57614857700); Ji Ningbo Institute of Materials Technology, Engineering, Chinese Academy of Sciences, Ningbo, 315201, China| Kwan San (57197716983); Zheng NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, 700000, Viet Nam| Junfeng (57258065300); Hui School of Engineering, Faculty of Science, University of East Anglia, Norwich, NR4 7TJ, United Kingdom|

Chemical Engineering Journal Số , năm 2022 (Tập 450, trang -)

ISSN: 13858947

ISSN: 13858947

DOI: 10.1016/j.cej.2022.138237

Tài liệu thuộc danh mục:

Article

English

Từ khóa: Aluminum; Carbon nanofibers; Ions; Nickel compounds; Reaction kinetics; Stability; Storage (materials); Sulfur compounds; Aluminum ions; Aluminum-ion battery; Anionic redox; Doped carbons; Electrospuns; Ion batteries; Large-scales; NiS2-based electrode; Redox process; S-doped; Cathodes
Tóm tắt tiếng anh
electrode reaction kinetics and rapid capacity fading and the available cathode materials always demonstrate poor structural stability, thereby greatly hindering their practical use. NiS2 with anion redox species (S22– dimers) and favorable electronic conductivity is a promising cathode to boost the performance of AIBs in terms of reversible capacity, rate capability and cycling stability. Here, we report a systematic investigation of the Al storage behavior and mechanism of NiS2/S-doped carbon (NiS2/SC) cathode based on a series of electrochemical tests and ex situ measurements. We further develop electrospun NiS2/S-doped carbon@S-doped carbon nanofiber (NiS2/SC@SCNF) structure as the cathode of AIBs. The as-fabricated AIB delivers an unprecedented Al3+ storage performance with a stable capacity of 76 mAh/g at 0.5 A/g CV 500 cycles and a superior cycling Coulombic efficiency of 97 %. This study reveals that NiS2/SC@SCNF undergoes a reversible evolution of initial Al3+ insertion followed by anionic redox between S22– and S2–, paving the road for the futher development of NiS2–based cathodes for AIBs. © 2022 Elsevier B.V.

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