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Microsized‐Carbon Anodes
In article number 2305841, Chengzhi Zhang, Jun Tan, Jinshui Liu, and co‐workers propose heterogeneous carbon‐carbon composite design with robust structure. The confinement effect originating from expanded‐graphite skeletons suppressed the crystallization degree of pitch‐derived carbon and contributed rich edge‐defect sites in composites, providing high capacity and stability...
Pitch‐derived carbon (PC) anode features the merits of low‐cost, rich edge‐defect sites, and tunable crystallization degree for potassium ion batteries (PIBs). However, gaining the PC anode with both rich edge‐defect sites and robust structure remains challenging. Herein, micro‐sized and robust PC/expanded‐graphite (EG) composites (EGC) with rich edge‐defect sites are massively synthesized via melting...
Hard Carbon have become the most promising anode candidates for sodium‐ion batteries, but the poor rate performance and cycle life remain key issues. In this work, N‐doped hard carbon with abundant defects and expanded interlayer spacing is constructed by using carboxymethyl cellulose sodium as precursor with the assistance of graphitic carbon nitride. The formation of N‐doped nanosheet structure...
Metallic‐phase iron sulfide (e.g., Fe7S8) is a promising candidate for high power density sodium storage anode due to the inherent metal electronic conductivity and unhindered sodium‐ion diffusion kinetics. Nevertheless, long‐cycle stability can not be achieved simultaneously while designing a fast‐charging Fe7S8‐based anode. Herein, Fe7S8 encapsulated in carbon‐sulfur bonds doped hollow carbon fibers...
Sodium Anode Materials
In article number 2302200, Chengzhi Zhang, Jun Tan, Jinshui Liu, and co‐workers present a high‐power density sodium‐ion batteries (SIBs) anode that Fe7S8 encapsulated in carbon‐sulfur bonds doped carbonaceous fibers (NHCFs‐S‐Fe7S8). The multinomial optimized NHCFs‐S‐Fe7S8 integrates a suitable structure for high power density and longer cycle life SIBs.
Na3V2(PO4)2F3 has attracted wide attention due to its high voltage platform, and stable crystal structure. However, its application is limited by the low electronic conductivity and the ease formation of impurity. In this paper, the spherical Br‐doped Na3V2(PO4)2F3/C is successfully obtained by a one‐step spray drying technology. The hard template polytetrafluoroethylene (PTFE) supplements the loss...
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