Open AccessArchitecting Braided Porous Carbon Fibers Based on High‐Density Catalytic Crystal Planes to Achieve Highly Reversible Sodium‐Ion Storage
Author(s) -
Li Chuanqi,
Zhang Zhijia,
Chen Yuefang,
Xu Xiaoguang,
Zhang Mengmeng,
Kang Jianli,
Liang Rui,
Chen Guoxin,
Lu Huanming,
Yu Zhenyang,
Li WeiJie,
Wang Nan,
Huang Qin,
Zhang Delin,
Chou ShuLei,
Jiang Yong
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202104780
Subject(s) - materials science , anode , chemical engineering , nanoporous , adsorption , graphene , carbon fibers , porosity , crystallite , chemical vapor deposition , ion , nanotechnology , electrode , composite material , chemistry , organic chemistry , metallurgy , composite number , engineering
Carbonaceous materials are considered strong candidates as anode materials for sodium‐ion batteries (SIBs), which are expected to play an indispensable role in the carbon‐neutral era. Herein, novel braided porous carbon fibres (BPCFs) are prepared using the chemical vapour deposition (CVD) method. The BPCFs possess interwoven porous structures and abundant vacancies. The growth mechanism of the BPCFs can be attributed to the polycrystalline transformation of the nanoporous copper catalyst in the early stage of CVD process. Density functional theory calculations suggest that the Na + adsorption energies of the mono‐vacancy edges of the BPCFs (−1.22 and −1.09 eV) are lower than that of an ideal graphene layer (−0.68 eV), clarifying in detail the adsorption‐dominated sodium storage mechanism. Hence, the BPCFs as an anode material present an outstanding discharge capacity of 401 mAh g −1 at 0.1 A g−1 after 500 cycles. Remarkably, this BPCFs anode, under high‐mass‐loading of 5 mg cm−2, shows excellent long‐term cycling ability with a reversible capacity of 201 mAh g −1 at 10 A g −1 over 1000 cycles. This study provided a novel strategy for the development of high‐performance carbonaceous materials for SIBs.