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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...
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.
Stable Li Metal Batteries
Ordered micro‐grooves are prepared by femtosecond laser on Cu foil for lithium metal battery. The deposition of Li can be directed by the micro‐grooves to form ordered and dense Li arrays. This idea for tuning lithium nucleation sites on current collector can significantly enlighten the future work for high‐energy‐density anode‐free full cells. More details can be found in...
Li metal anode is promising to achieve high‐energy‐density battery. However, it has rapid capacity fading due to the generation of inactive Li (dead Li), especially at high current density. This study reveals that the random distribution of Li nuclei leads to large uncertainty for the further growth behavior on Cu foil. Here, periodical regulation of Li nucleation sites on Cu foil by ordered lithiophilic...
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