Architecting Braided Porous Carbon Fibers Based on High‐Density Catalytic Crystal Planes to Achieve Highly Reversible Sodium‐Ion Storage. Issue 18 (26th April 2022)

• Record Type: Journal Article
• Authors: Li, Chuanqi; Zhang, Zhijia; Chen, Yuefang; Xu, Xiaoguang; Zhang, Mengmeng; Kang, Jianli; Liang, Rui; Chen, Guoxin; Lu, Huanming; Yu, Zhenyang; Li, Wei‐Jie; Wang, Nan; Huang, Qin; Zhang, Delin; Chou, Shu‐Lei; Jiang, Yong
• Is Part Of: Advanced science. Volume 9:Issue 18(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-04-26
• Subjects: anode materials -- catalytic active (111) planes -- chemical vapor deposition -- porous carbon fibers -- sodium‐ion batteries; Science -- Periodicals; 505
• DOI: 10.1002/advs.202104780
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: 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. Abstract : Braided porous carbon fibres (BPCFs) present interwoven structures and abundant vacancies, originating from high‐density carbon "fiber seeds" induced by high‐density catalytic activity (111) planes. The BPCFs anode shows excellent cycling ability with a reversible capacity of 201 mAh g −1 at 10 A g −1 over 1000 cycles.