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| 1 | 碳纳米纤维表面网络修饰及其锌离子电池应用显示文摘可充电水系锌锰电池以高安全、低成本和对环境友好的特性在大规模储能领域有广泛的应用前景,但由于锰氧化合物自身导电差且在电池充放电过程中发生歧化反应在水中溶解,导致电池容量低、循环稳定性差。本文采用双针头对纺静电纺丝技术,结合预氧化、高温退火工艺,通过掺杂碳纳米管(CNTs)和导电炭黑(Super-P)对碳纳米纤维表面进行修饰,制备出具有凸起结构和导电网络的碳纳米纤维(CSCNFs)复合材料,再结合电化学沉积工艺,在纤维表面负载α-MnO_(2)活性物质制备得到MnO_(2)@CSCNFs阴极。其中,CNTs和Super-P协同构建了具有节点结构的导电网络通道,实现高效电子-离子协同传输。以MnO_(2)@CSCNFs为阴极的电化学性能得到明显改善,初始容量达到784.8 mA·h·g^(-1),100圈循环后仍保持500 mA·h·g^(-1)的放电比容量,2 A·g^(-1)的大电流密度下仍保持290.8 mA·h·g^(-1)的放电比容量,且当电流密度恢复到0.1 A·g^(-1)时容量回复率高达96.33%。 | 卢小杰 徐晶 杨科 闫俊 陈磊 刘雍 | 2023 | 复合材料学报2023，40，5： | 0 |
| 2 | High Rate Performance of Aqueous Magnesium-iron-ion Batteries Based on Fe_(2)O_(3)@GH as the Anode显示文摘Aqueous Mg-ion batteries(MIBs)are safe,non-toxic and low-cost.Magnesium has a high theoretical specific capacity with its ion radius close to that of lithium.Therefore,aqueous magnesium ion batteries have great research advantages in green energy.To acquire the best electrode materials for aqueous magnesium ion batteries,it is necessary for the structural design in material.Fe_(2)O_(3)is an anode material commonly used in Li-ion battery.However,the nano-cube Fe_(2)O_(3)combined with graphene hydrogels(GH)can be successfully prepared and employed as an anode,which is seldom researched in the aqueous batteries system.The Fe_(2)O_(3)/GH is used as anode in the dual MgSO_(4)+FeSO_(4)aqueous electrolyte,avoiding the irreversible deintercalation of magnesium ions.In addition,the Fe element in anode material can form the Fe^(3+)/Fe^(2+)and Fe^(2+)/Fe^(3+)redox pairs in the MgSO_(4)+FeSO_(4)electrolyte.Thus,the reversible insertion/(de)insertion of magnesium and iron ions into/from the host anode material can be simultaneously achieved.After the initial charge,the anodic structure is changed to be more stable,avoiding the formation of MgO.The Fe_(2)O_(3)/GH demonstrates high rate properties and reversible capacities of 198,151,121,80,75 and 27 mAh g^(−1)at 50,100,200,300,500 and 1000 mA g^(−1)correspondingly. | 邵双喜 苍睿柏 叶克 高胤义 朱凯 闫俊 王贵领 曹殿学 | 2021 | Chinese Journal of Structural Chemistry2021，40，7： | 0 |
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