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| 1 | 构建分级结构碳包覆的MoSSe纳米片/多孔碳微球复合材料显著提升储钾性能显示文摘研发能够有效缓解储钾过程中巨大的体积变化和加快反应动力学的先进负极材料,对于钾离子电池的实际应用至关重要.为此,本文报道了一种新颖分级结构薄层碳包覆的MoSSe纳米片/多孔碳微球复合负极材料Cs@MoSSe@C,能够显著提升储钾性能.在这种新颖结构中,多孔碳微球骨架上锚定的分级MoSSe纳米片具有较大的层间距和丰富的阴离子空位,有利于钾离子的快速嵌入、脱出,并能提供丰富的钾离子存储活性位点.同时,薄碳层和高度多孔的碳微球骨架可有效缓解充放电过程中体积膨胀和加快反应动力学,并维持电极结构稳定性.因此,研发的Cs@MoSSe@C负极材料及其组配的全电池都表现出了优异的循环稳定性和出色的倍率性能.此外,通过原位透射电镜技术、原位拉曼技术和非原位显微技术结合理论模拟揭示了其嵌入-转化反应储钾机理和获得优异电化学性能的本质原因.该工作为高性能过渡金属硫族化合物储钾负极材料的构筑与性能优化提供了实验依据和新策略. | Mengting Cai Hehe Zhang Yinggan Zhang Bensheng Xiao Lei Wang Miao Li Ying Wu Baisheng Sa Honggang Liao Li Zhang Shuangqiang Chen Dong-Liang Peng Ming-Sheng Wang Qiaobao Zhang | 2022 | Science Bulletin2022，67，9： | 6 |
| 2 | Achieving high-capacity and long-life K^(+)storage enabled by constructing yolk-shell Sb_(2)S_(3)@N,S-doped carbon nanorod anodes显示文摘As promising anode candidates for potassium-ion batteries(PIBs),antimony sulfide(Sb_(2)S_(3))possesses high specific capacity but suffers from massive volume expansion and sluggish kinetics due to the large K^(+)insertion,resulting in inferior cycling and rate performance.To address these challenges,a yolk-shell structured Sb_(2)S_(3)confined in N,S co-doped hollow carbon nanorod(YS-Sb_(2)S_(3)@NSC)working as a viable anode for PIBs is proposed.As directly verified by in situ transmission electron microscopy(TEM),the buffer space between the Sb_(2)S_(3)core and thin carbon shell can effectively accommodate the large expansion stress of Sb_(2)S_(3)without cracking the shell and the carbon shell can accelerate electron transport and K^(+)diffusion,which plays a significant role in reinforcing the structural stability and facilitating charge transfer.As a result,the YS-Sb_(2)S_(3)@NSC electrode delivers a high reversible K^(+)storage capacity of 594.58 m A h g^(-1)at 0.1 A g^(-1)and a long cycle life with a slight capacity degradation(0.01%per cycle)for 2000 cycles at 1 A g^(-1)while maintaining outstanding rate capability.Importantly,utilizing in in situ/ex situ microscopic and spectroscopic characterizations,the origins of performance enhancement and K^(+)storage mechanism of Sb_(2)S_(3)were clearly elucidated.This work provides valuable insights into the rational design of high-performance and durable transition metal sulfides-based anodes for PIBs. | Bensheng Xiao Hehe Zhang Zhefei Sun Miao Li Yingzhu Fan Haichen Lin Haodong Liu Bing Jiang Yanbin Shen Ming-Sheng Wang Meicheng Li Qiaobao Zhang | 2023 | Journal of Energy Chemistry2023，，1： | 1 |
| 3 | Synergistic coupling of amorphous carbon and graphitic domains toward high-rate and long-life K^(+) storage显示文摘Amorphous carbon materials hold great potential for practical use in potassium-ion batteries(PIBs)due to their abundant resources,low cost and high structural stability.However,given the challenge of sluggish potassiation kinetics,the rate performance of amorphous carbon is severely hindered.Herein,amorphous carbon compounded with graphitic domains(HG-CNTs)was proposed as an advanced anode for PIBs.As directly verified by in situ transmission electron microscopy(TEM),the graphitic domains guarantee fast K-ions transport in the carbon composite at a high current density,while the amorphous carbon shells ensure the structural integrity during potassiation,thus boosting its fast and durable K^(+)storage.As a PlB anode,the HG-CNTs electrode exhibits not only a super-stable long-term cyclability(191.6 mAh g^(-1)at 1 A g^(-1)with almost no capacity decay over 3000 cycles),but also an outstanding rate performance(184.5 mAh g^(-1)at 2 A g^(-1)).Ex situ Raman and TEM results further suggest that the highly reversible structure of HG-CNTs is responsible for its superior electrochemical stability.This work provides helpful insights into the development of carbonaceous electrodes with both high rate capability and long cycle life for PIBs. | Hehe Zhang Wangqin Li Jianhai Pan Zhefei Sun Bensheng Xiao Weibin Ye Chengzhi Ke Haowen Gao Yong Cheng Qiaobao Zhang Ming-Sheng Wang | 2022 | Journal of Energy Chemistry2022，31，10： | 0 |
| 4 | Atomic mechanisms of hexagonal close-packed Ni nanocrystallization revealed by in situ liquid cell transmission electron microscopy显示文摘The fundamental understanding of the mechanism underlying the early stages of crystallization of hexagonal-close-packed(hcp)nanocrystals is crucial for their synthesis with desired properties,but it remains a significant challenge.Here,we report using in situ liquid cell transmission electron microscopy(TEM)to directly capture the dynamic nucleation process and track the real-time growth pathway of hcp Ni nanocrystals at the atomic scale.It is demonstrated that the growth of amorphous-phase-mediated hcp Ni nanocrystals is from the metal-rich liquid phases.In addition,the reshaped preatomic facet development of a single nanocrystal is also imaged.Theoretical calculations further identify the non-classical features of hcp Ni crystallization.These discoveries could enrich the nucleation and growth model theory and provide useful information for the rational design of synthesis pathways of hcp nanocrystals. | Junyu Zhang Miao Li Zewen Kang Bensheng Xiao Haichen Lin Jingyu Lu Haodong Liu Xue Zhang Dong-Liang Peng Qiaobao Zhang | 2022 | Nano Research2022，15，7： | 0 |
| 5 | Understanding the growth mechanisms of metal-based core–shell nanostructures revealed by in situ liquid cell transmission electron microscopy显示文摘Metal-based core-shell nanostructures have garnered enduring interest due to their unique properties and functionalities.However,their growth and transformation mechanisms in liquid media remain largely unknown because they lack direct observation of the dynamic growth process with high spatial and temporal resolution.Developing the in situ liquid cell transmission electron microscopy(TEM)technique offers unprecedented real-time imaging and spectroscopy capabilities to directly track the evolution of structural and chemical transformation of metal-based core–shell nanostructures in liquid media under their working condition.Here,this review highlights recent progress in utilizing in situ liquid cell TEM characterization technique in investigating the dynamic evolution of material structure and morphology of metal-based core–shell nanostructures at the nano/atomic scale in real-time.A brief introduction of the development of liquid cells for in situ TEM is first given.Subsequently,recent advances in in situ liquid cell TEM for the fundamental study of growth mechanisms of metal based core–shell nanostructures are discussed.Finally,the challenge and future developments of metalbased core–shell nanostructures for in situ liquid cell TEM are proposed.Our review is anticipated to inspire ongoing interest in revealing unseen growth dynamics of core–shell nanostructures by in situ liquid cell TEM technique. | Junyu Zhang Bensheng Xiao Junhui Zhao Miao Li Haichen Lin Zewen Kang Xianwen Wu Haodong Liu Dong-Liang Peng Qiaobao Zhang | 2022 | Journal of Energy Chemistry2022，31，8： | 0 |
| 6 | Advances in the structure design of substrate materials for zinc anode of aqueous zinc ion batteries显示文摘Aqueous zinc ion batteries(AZIBs) demonstrate tremendous competitiveness and application prospects because of their abundant resources,low cost, high safety, and environmental friendliness. Although the advanced electrochemical energy storage systems based on zinc ion batteries have been greatly developed, many severe problems associated with Zn anode impede its practical application, such as the dendrite formation,hydrogen evolution, corrosion and passivation phenomenon. To address these drawbacks, electrolytes, separators, zinc alloys, interfacial modification and structural design of Zn anode have been employed at present by scientists. Among them, the structural design for zinc anode is relatively mature, which is generally believed to enhance the electroactive surface area of zinc anode, reduce local current density, and promote the uniform distribution of zinc ions on the surface of anode. In order to explore new research directions, it is crucial to systematically summarize the structural design of anode materials. Herein, this review focuses on the challenges in Zn anode, modification strategies and the three-dimensional(3D) structure design of substrate materials for Zn anode including carbon substrate materials, metal substrate materials and other substrate materials. Finally, future directions and perspectives about the Zn anode are presented for developing high-performance AZIBs. | Sinian Yang Hongxia Du Yuting Li Xiangsi Wu Bensheng Xiao Zhangxing He Qiaobao Zhang Xianwen Wu | 2023 | Green Energy & Environment2023，8，6： | 0 |
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