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Li‐Ion Batteries: FeP@C Nanotube Arrays Grown on Carbon Fabric as a Low Potential and Freestanding Anode for High‐Performance Li‐Ion Batteries (Small 30/2018) 
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下载免费PDF全文 Xijun Xu Jun Liu Zhengbo Liu Zhuosen Wang Renzong Hu Jiangwen Liu Liuzhang Ouyang Min Zhu 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(30)
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Advanced functional materials enable lithium‐ion batteries to reach high specific capacity. To achieve this goal, nickel foam (NF), as current collector, is chosen to in situ form aligned nanoarrays composed of CoP3/carbon polyhedron (CP)/CoO. The CoO nanowire acts as bridge to link NF and CoP3/CP which not only reinforces the adhesion between active material and NF but also enhances the capacity of whole electrode. Besides, CoP3 is evenly coupled with CP, which can effectively buffer the volume expansion of CoP3 during the charge/discharge process. Moreover, the novel architecture of CoP3/CP/CoO/NF is beneficial to improve the electronic conductivity. As a result, the CoP3/CP/CoO/NF anode delivers an ultrahigh specific capacity of 1715 mAh g?1 at 0.5 A g?1 which can remain at 1150 mAh g?1 after 80 cycles, demonstrating the good durability. Thus, this work develops a facile strategy to design self‐supporting electrodes for an enhanced energy storage device. 相似文献
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《Advanced Materials Technologies》2018,3(3)
Self‐supported titanium dioxide nanotube is explored as a potential negative electrode for 3D Li‐ion (micro) batteries. Apart from the direct contact of the nanotubes with the substrate, the 1D porous structure effectively facilitates the flow of electrolyte into the bulk, alleviates any volume expansion during cycling, and provides a short lithium‐ion diffusion length. The fabrication of self‐supported Nb rich titanium dioxide nanotubes by electrochemical anodization of Ti–Nb alloys is reported. The structure, morphology, and the composition of the Nb alloyed TiO2 nanotubes are studied using scanning electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. The electrochemical behavior of the alloyed and the pristine TiO2 nanotubes is investigated by cyclic voltammetry, chronopotentiometry, and electrochemical impedance spectroscopy. The electrochemical performance of the pristine and the alloyed titania nanotubes reveals that as the niobium concentration increases the capacity increases. The titania nanotubes containing 10 wt% of Nb deliver a higher capacity, with good capacity retention and coulombic efficiency. Electrochemical impedance spectroscopy analysis shows that Nb alloying can decrease the overall cell impedance by reducing the charge transfer resistance. 相似文献
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Weihua Chen Xixue Zhang Liwei Mi Chuntai Liu Jianmin Zhang Shizhong Cui Xiangming Feng Yuliang Cao Changyu Shen 《Advanced materials (Deerfield Beach, Fla.)》2019,31(8)
Sodium‐ion batteries (SIBs) have gained tremendous interest for grid scale energy storage system and power energy batteries. However, the current researches of anode for SIBs still face the critical issues of low areal capacity, limited cycle life, and low initial coulombic efficiency for practical application perspective. To solve this issue, a kind of hierarchical 3D carbon‐networks/Fe7S8/graphene (CFG) is designed and synthesized as freestanding anode, which is constructed with Fe7S8 microparticles well‐welded on 3D‐crosslinked carbon‐networks and embedded in highly conductive graphene film, via a facile and scalable synthetic method. The as‐prepared freestanding electrode CFG represents high areal capacity (2.12 mAh cm?2 at 0.25 mA cm?2) and excellent cycle stability of 5000 cycles (0.0095% capacity decay per cycle). The assembled all‐flexible sodium‐ion battery delivers remarkable performance (high areal capacity of 1.42 mAh cm?2 at 0.3 mA cm?2 and superior energy density of 144 Wh kg?1), which are very close to the requirement of practical application. This work not only enlightens the material design and electrode engineering, but also provides a new kind of freestanding high energy density anode with great potential application prospective for SIBs. 相似文献
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Botian Liu Songjie Wang Zilong Wang Hang Lei Zhitao Chen Wenjie Mai 《Small (Weinheim an der Bergstrasse, Germany)》2020,16(22)
The recharge ability of zinc metal‐based aqueous batteries is greatly limited by the zinc anode. The poor cycling durability of Zn anodes is attributed to the dendrite growth, shape change and passivation, but this issue has been ignored by using an excessive amount of Zn in the past. Herein, a 3D nanoporous (3D NP) Zn–Cu alloy is fabricated by a sample electrochemical‐assisted annealing thermal method combined, which can be used directly as self‐supported electrodes applied for renewable zinc‐ion devices. The 3D NP architectures electrode offers high electron and ion transport paths and increased material loading per unit substrate area, which can uniformly deposit/strip Zn and improve charge storage ability. Benefiting from the intrinsic materials and architectures features, the 3D NP Zn–Cu alloy anode exhibits high areal capacity and excellent cycling stability. Further, the fabricated high‐voltage double electrolyte aqueous Zn–Br2 battery can deliver maximum areal specific capacity of ≈1.56 mAh cm?2, which is close to the level of typical commercial Li‐ion batteries. The excellent performance makes it an ideal candidate for next‐generation aqueous zinc‐ion batteries. 相似文献
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Shibing Ni Jicheng Zhang Jianjun Ma Xuelin Yang Lulu Zhang Xiaoming Li Haibo Zeng 《Advanced Materials Interfaces》2016,3(1)
Li3VO4 is a potential anode for Li‐ion batteries owing to its safe discharge plateau and high capacity, but the reported reversible capacity is still far from its theoretical value (592 mAh g−1). Here, for the first time, a Li3VO4 anode is reported with reversible capacity approaching the theoretical value. Li3VO4 aggregates hybridized with carbon (Li3VO4/C) are first fabricated, and then dramatically transform into well dispersed Li3VO4 nanocrystals (NCs) anchoring on carbon nanoflakes (NFs) by electrochemical reconstruction. In the Li3VO4/C NC‐on‐NF structures, the small‐sized Li3VO4 NCs, the flexible carbon NFs, and the good dispersity provide high Li‐ion storage, electronic conductivity and stability, respectively. Resultingly, outstanding electrochemical performance of the Li3VO4/C is achieved with discharge and charge capacities of 542 and 541 mAh g−1 after 300 cycles at a specific current of 150 mA g−1. After 1000 cycles at a specific current of 2000 mA g−1, the discharge and charge capacities are maintained at 422 and 421 mAh g−1. When matching with a 4 V cathode, the specific energy density of the Li3VO4/C is 4.2 times of Li4Ti5O12 and 1.2 times of graphite, and the volumetric energy density is 3.2 times of Li4Ti5O12 and 1.4 times of graphite. 相似文献
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Electrodes: Engraving Copper Foil to Give Large‐Scale Binder‐Free Porous CuO Arrays for a High‐Performance Sodium‐Ion Battery Anode (Adv. Mater. 14/2014) 下载免费PDF全文
下载免费PDF全文 Shuang Yuan Xiao‐lei Huang De‐long Ma Heng‐guo Wang Fan‐zhi Meng Xin‐bo Zhang 《Advanced materials (Deerfield Beach, Fla.)》2014,26(14):2284-2284
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Guanglin Xia Hongyu Zhang Ming Liang Jian Zhang Weiwei Sun Fang Fang Dalin Sun Xuebin Yu 《Advanced materials (Deerfield Beach, Fla.)》2019,31(24)
Aluminum is regarded as a promising alternative for graphite anode in next‐generation lithium‐ion batteries, but its application is hindered by the simultaneous presence of aluminum oxide and the huge volume changes. Herein, hydrogenation‐induced self‐assembly of robust Al nanocrystals with high purity that are uniformly anchored on graphene is demonstrated. The strong molecular interaction between Al and graphene can not only thermodynamically facilitate the homogenous distribution of Al on graphene but also effectively alleviate the volume changes and preserve the structural integrity of the electrode. More importantly, density functional theory calculations reveal that the absence of oxidation can lower the energy barrier for Li diffusion inside the Al matrix to less than 1/6 of that in an Al matrix with only one monolayer coverage of oxygen. These unique structural features enable the aluminum/graphene nanosheets (Al@GNs) electrode to realize a high reversible capacity of 1219 mAh g?1 and an excellent cycling stability with capacity of 766 mAh g?1 after 1000 cycles at the 3 A g?1 rate. Furthermore, a full cell, comprising an Al@GNs anode and LiFePO4 cathode, exhibits remarkable capacity retention of 96.4% after 100 cycles at the 0.5 A g?1 rate. 相似文献
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Self‐organized, anodically grown titanium dioxide (TiO2) nanotubes have been readily studied as anode material in various ion batteries. The simple way of nanostructuring via anodization of a Ti metal substrate and the fact that either their nanotubular morphology or bulk structure can be readily adjusted by changing the anodization and/or annealing conditions make them an attractive model anode material. This enables the investigation of different phenomena by selectively changing one specific parameter of the ion insertion mechanism. This review focuses on the recent progress in understanding the ion storage characteristics of anodic self‐organized TiO2 nanotubes in Li‐, Na‐, and Al‐ion batteries. Insights into the electrochemical behavior of the anode material as well as methodological approaches are highlighted. 相似文献