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| 1 | Unveiling the impact of residual Li conversion and cation ordering on electrochemical performance of Co-free Ni-rich cathodes显示文摘The residual Li and Li^(+)/Ni_(2)+cation mixing play essential roles in the electrochemical properties of Ni-rich cathodes.However,a general relationship between the residual Li conversion,cation mixing,and their effects on the Li^(+)kinetics and structural stability has yet to be established,due to the presence of cobalt in the cathode.Here,we explore the synergistic impact of the residual Li conversion and cation ordering on a Co-free Ni-rich cathode(i.e.,LiNi0.95Mn0.05O_(2)).It discloses that the rate capability is mainly affected by residual Li contents and operating voltage.Specifically,residual Li can be electrochemically converted to cathode electrolyte interphase(CEI)below 4.3 V,thus inducing high interphase resistance,and decomposes to produce CO_(2)-dominated gas at 4.5 V,causing temporary enhancement of Li^(+)diffusivity but severe surface degradation during cycling.Moreover,the cycling performance of Co-free Ni-rich cathode is not only determined by Li^(+)/Ni_(2)+cation-ordered superlattice,which enhances the structural stability as it functions as the pillar to impede lattice collapse at a highly charged state,but also by the robust CEI layers which protect the bulk from electrolyte attack under 4.3 V.These findings promote an in-depth understanding of residual Li conversion and Li^(+)/Ni_(2)+cation ordering on Co-free Ni-rich cathode. | Chu Wang Lei Tan Hongling Yi Zixiang Zhao Xiaoli Yi Youyuan Zhou Junchao Zheng Jiexi Wang Lingjun Li | 2022 | Nano Research2022，15，10： | 1 |
| 2 | 沥青基炭材料:结构设计、制备方法及其在储能中应用显示文摘沥青具有炭含量高、易石墨化的特点,被认为是制备炭材料的一种很有前途的前驱体。为了生产出具有理想性能的炭材料,必须解决由沥青复杂组成和易于软化的特性所导致的炭材料结构难以控制的问题。最近,研究人员提出了几种有效方法来调控沥青基炭材料的结构。本文总结了沥青基炭材料的结构设计、制备方法及其背后机理的最新进展,同时介绍了其在超级电容器和碱金属离子电池等储能装置中的应用。 | 刘慧超 朱胜 常云珍 侯文静 韩高义 | 2023 | 新型炭材料(中英文)2023，38，3： | 0 |
| 3 | Scalable synthesis of N-doped Si/G@voids@C with porous structures for high-performance anode of lithium-ion batteries显示文摘The co-utilization of silicon(Si) and graphite(G) has been considered as the preferred strategy to achieve high energy density anode materials,but the effective synergistic integration of Si and graphite is still a challenge and it is necessary to find a scheme to accommodate the large-scale production of Si/graphite anodes.In this work,silicon cutting waste from the photovoltaic industry was used as raw material,mixed with graphite,pitch,and polyvinylpyrrolidone,and subjected to high-energy ball milling.The mixture was then heated in an Ar atmosphere for the carbon coating,and the resulting Si/graphite/carbon(Si/G/C) composite was etched to remove the thicker SiOx layer formed on the Si surface to allow the pores between the Si and the carbon matrix to obtain Si@voids/G@C.Benefiting from the integrated structural design and the significantly enhanced electronic conductivity,the Si/G@voids@C composite exhibited the first dischargespecific capacity of 2530 mAh·g^(-1) with an initial coulombic efficiency(ICE) of 86.7%,and the remaining capacity exceeded 1000 mAh·g^(-1) after 550 cycles at 1.5A·g^(-1).Notably,full lithium-ion batteries with a Si/G@voids@C anode and LiFePO_4 cathode delivered a stable capacity of 140 mAh·g^(-1).The synthesis method is facile and cost-effective,providing an integration strategy for Si and G with a potential scheme for large-scale commercial applications. | Lei Wang Yan Jiang Shao-Yuan Li Xiu-Hua Chen Feng-Shuo Xi Xiao-Han Wan Wen-Hui Ma Rong Deng | 2023 | Rare Metals2023，42，12： | 0 |
| 4 | In situ construction of a favorable cathode electrolyte interphase through a fluorosilane additive for high-performance Li-rich cathode materials显示文摘Li-rich manganese-based oxides (LRMO) with high capacities are attractive cathode materials for next-generation lithium-ion batteries.However,poor cycling stability is one of the key issues impeding their commercialization.Here,for the first time,we employed trimethoxy(3,3,3-trifluoropropyl)silane (TMTFS) as a multifunctional electrolyte additive to stabilize the LRMO cathode interphase and elevate its cycling performance.The LRMO electrode delivered a high reversible capacity of 250.4 mAh·g^(-1) with a stable capacity retention of 91% after 200 cycles. | Yuan-Yuan Pan Chang-Ding Qiu Shi-Jie Qin Zuo-Fei Wang Jing-Song Yang Heng-Jiang Cong Fu-Sheng Ke | 2022 | Rare Metals2022，41，11： | 0 |
| 5 | Dendrite-free and stable Zn metal anodes with ZnO protective layer显示文摘Metallic Zn can be used as an anode for aqueous zinc-ion batteries due to its low redox potential,rich resources,and high theoretical capacity.However,its practical application is limited by dendrite growth and side reactions.Herein,a simple in-situ growth strategy was applied to fabricate a Zn anode with a ZnO protective layer(Zn/ZnO)to lengthen the cycle life and inhibit the dendrite growth and side reactions.At 1 mA h cm^(−2)capacity,Zn/ZnO exhibits long-time stability(2500 h)at 1 mA cm^(−2)and outstanding rate capability(1000 h at 10 mA cm^(−2))in symmetrical cells.Furthermore,the average coulombic efficiency of the Zn/ZnO//Ti cell is 99.4%,which is desirable at 5 mA cm^(−2).In addition,the Zn/ZnO//MnO_(2)cell can maintain a specific capacity of 167.2 mA h g^(−1)after 800 stable cycles.This work presents a simple fabrication method for Zn anode with excellent performance and suggests the huge possibilities of implementing practically rechargeable aqueous zinc-ion batteries. | HOU ZhenHua TAO HuaChao WANG JiaXu ZHANG LuLu YANG XueLin | 2022 | Science China(Technological Sciences)2022，65，10： | 0 |
| 6 | Shining light on transition metal tungstate-based nanomaterials for electrochemical applications:Structures,progress,and perspectives显示文摘Transition metal tungstate-based nanomaterials have become one of the research hotspots in electrochemistry due to their abundant natural resources,low costs,and environmental friendliness.Extensive studies have demonstrated their significant potentials for electrochemical applications,such as supercapacitors,Li-ion batteries,Na-ion batteries,electrochemical sensing,and electrocatalysis.Considering the rapidly growing research enthusiasm for this topic over the last several years,herein,a critical review of recent progress on the application of transition metal tungstates and their composites for electrochemical applications is summarized.The relationships between synthetic methods,nano/micro structures and electrochemical properties are systematically discussed.Finally,their promising prospects for future development are also proposed.It is anticipated that this review will inspire ongoing interest in rational designing and fabricating novel transition metal tungstate-based nanomaterials for high-performance electrochemical devices. | Kaijia Feng Zhefei Sun Yong Liu Feng Tao Junqing Ma Han Qian Renhong Yu Kunming Pan Guangxin Wang Shizhong Wei Qiaobao Zhang | 2022 | Nano Research2022，15，8： | 0 |
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