VN基材料的电子结构调控和超电容性能研究  

Regulation on electronic structure of VN-based materials for enhanced supercapacitor performances

作　　者：张东彬 常智 滕艾均 刘天豪 代宇 彭显著 杜光超[3] 康举 Zhang Dongbin;Chang Zhi;Teng Aijun;Liu Tianhao;Dai Yu;Peng Xianzhu;Du Guangchao;Kang Ju(Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102211,China;Pangang Group Vanadium&Titanium Re-sources Co.,Ltd.,Panzhihua 617000,Sichuan,China;Pangang Group Research Institute Co.,Ltd.,State Key Laborat-ory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China;Beijing In-stitute of Petrochemical Technology,Beijing Key Laboratory of Key Technologies and Equipment for Deepwater Oil and Gas Pipelines,Beijing 102617,China)

机构地区：[1]鞍钢集团北京研究院有限公司,北京102211 [2]攀钢集团钒钛资源股份有限公司,四川攀枝花617000 [3]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [4]北京石油化工学院,深水油气管线关键技术与装备北京市重点实验室,北京102617

出　　处：《钢铁钒钛》2022年第5期45-51,共7页Iron Steel Vanadium Titanium

基　　金：深水油气管线关键技术与装备北京市重点实验室开发课题资助项目(BIPT2020003)。

摘　　要：从改变VN材料固有本征特性的角度出发,提出了一种利用电子结构调控来改善VN材料电化学性能的方法。通过利用Fe元素的掺杂,调控材料的电子结构状态,达到调控其电化学性能的目的;通过XRD、HRTEM、XPS等方法表征Fe元素掺杂前后对VN基材料微观形貌和电子结构的影响;结合DFT计算结果表明:Fe元素的电子调控改变了VN材料的电子/离子输运能力,使得所制备的Fe-VN材料表现出优异的超电容性能;当电流密度为1 A/g时,其比容量为343.75 F/g,同时,经过1 000次循环充放电后,仍能保持85%的初始容量。In this paper, a method to improve the electrochemical performances of VN-based materials by electronic structure regulation is proposed. By Fe doping, the electronic structure of VN-based materials was modified for better electrochemical performances. XRD, HRTEM, XPS and other methods were used to characterize the effect of Fe on the microstructure and electronic structure of VN-based materials. Combined with the DFT calculation, it shows that the electron/ion transport capacity of VNbased materials is changed by introduction of Fe element, which endows the as-prepared Fe-VN material with excellent supercapacitor performances. The specific capacity is 343.75 F/g at a current density of 1 A/g, and 85% of the initial capacity can be retained after 1000 charge-discharge cycles.

关 键 词：VN基材料 电子结构 掺杂 FE 超级电容器 

分 类 号：TF841.3[冶金工程—有色金属冶金]