利用γ辐照在泡沫镍表面原位合成高循环稳定性及高比电容超级电容器NiMoO_(4)正极材料  

In situ synthesis of NiMoO_(4)cathode with high cycle stability and high specific capacitance for supercapacitors on nickel foam via gamma irradiation

作　　者：张凯 颜伟 吴茂生 龙译文 张帆 韩泓炜 程霄琳 郭丰 邢哲[1,2] 胡江涛 吴国忠[1,2] ZHANG Kai;YAN Wei;WU Maosheng;LONG Yiwen;ZHANG Fan;HAN Hongwei;CHENG Xiaolin;GUO Feng;XING Zhe;HU Jiangtao;WU Guozhong(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;ShanghaiTech University,Shanghai 14423,China;Shanghai University,Shanghai 10280,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049 [3]上海科技大学,上海200120 [4]上海大学,上海201900

出　　处：《辐射研究与辐射工艺学报》2024年第6期115-125,共11页Journal of Radiation Research and Radiation Processing

基　　金：国家自然科学基金(22176194);科学挑战专题基金(TZ2018004);新型海水提铀材料设计制备及性能验证研究资助。

摘　　要：为提高超级电容器的电容性能,采用辐照技术将钼源引入泡沫镍(NF)表面,制备NiMoO_(4)电极材料。通过调整吸收剂量,对材料形貌、微观结构和电化学性能进行优化。在泡沫镍表面原位合成的NiMoO_(4)可直接用作超级电容器的正极材料,展现出优异的储能性能。在1 A/g电流密度下,其比电容达到586.1 C/g,在15 A/g时仍保留361.5 C/g的比电容及85.6%的倍率性。该材料经过10000次充放电循环后,比电容仍保持533.4 C/g,容量保持率为91.6%,显示出良好的循环稳定性。将NiMoO_(4)电极材料与活性炭(AC)组装成混合超级电容器NiMoO_(4)//AC,该器件最大工作电压为1.7 V,在功率密度为800.0 W/kg时展现出高能量密度(44.5 Wh/kg)。在10 A/g电流密度下,该器件充放电5000次后,比电容仍能保持93.2%。该研究表明,通过辐照技术制备的NiMoO_(4)电极材料具有优异电化学性能和良好应用前景,为设计高效、低成本的超级电容器电极材料提供新思路。To enhance the capacitive performance of supercapacitors,NiMoO_(4)electrode materials were synthesized by applying a molybdenum source to the nickel foam(NF)surface using irradiation technology.The morphology,microstructure,and electrochemical properties of the materials were optimized by varying the absorbed dose.The in situ synthesized NiMoO_(4)on an NF surface is an effective anode material for supercapacitors,demonstrating impressive energy storage capabilities.Its specific capacitance reaches 586.1 C/g at a current density of 1 A/g.It maintains a specific capacitance of 361.5 C/g at 15 A/g,resulting in a performance retention of 85.6%.Furthermore,the material retains a specific capacitance of 533.4 C/g with a capacity retention rate of 91.6%after 10000 charge/discharge cycles,indicating strong cycling stability.The NiMoO_(4)electrode material was combined with activated carbon(AC)to create a hybrid supercapacitor,NiMoO_(4)//AC.This device,operating at a maximum voltage of 1.7 V,exhibited a high energy density of 44.5 Wh/kg at a power density of 800.0 W/kg.The specific capacitance of the device remained at 93.2%after 5000 charge/discharge cycles at a current density of 10 A/g.This study demonstrated that NiMoO_(4)electrode materials,prepared via irradiation,possess excellent electrochemical properties and significant application potential,offering a novel approach for designing high-efficiency,low-cost supercapacitor electrodes.

关 键 词：超级电容器 辐照技术 无机氧化物 镍基材料 比电容 

分 类 号：TL13[核科学技术—核能科学]