具有丰富硫空位的强吸光Cu_(2)S/CuCl异质阵列的构筑及其在光充电赝电容中的应用  

Enhancing solar energy harvest by Cu_(2)S/CuCl heteroarrays with enriched sulfur vacancies for photo-rechargeable pseudocapacitors

作　　者：朱挺 何智良 安致宇 徐睿瞳 李阳光 者荣杰 王洪恩 庞欢 Ting Zhu;Zhiliang He;Zhiyu An;Ruitong Xu;Yangguang Li;Rongjie Zhe;Hong-En Wang;Huan Pang(School of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China;School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225000,China)

机构地区：[1]School of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China [2]School of Materials Science and Engineering,Central South University,Changsha 410083,China [3]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225000,China

出　　处：《Science China Materials》2023年第6期2216-2226,共11页中国科学（材料科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(52162037);Yunnan Fundamental Research Projects(202201AT070041);the Natural Science Foundation of Hunan Province(General Program,2021JJ30797)。

摘　　要：拓宽材料对光子的吸收是利用太阳光能的关键.然而,要平衡电极材料对光的最大化吸收与存储是当前光电极材料的设计难点.本文报道了一种具有丰富硫空位的Cu_(2)S/CuCl异质阵列材料,该材料中CuCl与硫空位的存在增加了其对光子的捕获与转化.同时,Cu_(2)S/CuCl异质结增加了材料的导电性能,促进了电子的传输效率.当作为赝电容的电极材料时,该Cu_(2)S/CuCl双功能材料的光照下容量提升比率高达35%.同时,由该材料制成的非对称电容器循环测试6000次之后的面积比容量可依旧维持在670 mF cm^(-2).该Cu_(2)S/CuCl材料具有优异的光电化学性能,在下一代光辅助充电储能器件的应用领域展示出巨大前景.The use of broadband light energy is important for enhancing photoenergy conversion.However,bifunctional materials that can efficiently harvest solar energy to assist electrochemical energy storage are difficult to prepare.Herein,copper foam(CF)-supported cuprous sulfide(Cu_(2)S)heteroarrays(CS HAs)with enriched sulfur(S)vacancies(Vs)were designed for photo-rechargeable pseudocapacitors.A direct hydrothermal sulfurization of CF first resulted in the growth of CS HAs with leaf-like heterostructures.Subsequent partial oxidation of S^(2-)in FeCl_(3)aqueous solution enriched the Vs within the leaf-like structures.In addition.CuCl and Cu_(2O)were formed from Cu_(2S)during FeCl_(3)treatment to derive a bifunctional photoelectrode with ternary components,thus further broadening the light absorption region.Thus,the optimal CS HAs have demonstrated areal capacitances of 1440-1048 mF cm^(-2)with the assistance of the photoelectric/thermal effects of light energy,delivering remarkable photoenhancements of 25%-35%.The asymmetrical pseudocapacitors fabricated from the optimal photoelectrodes delivered a high areal capacitance of 670 mF cm^(-2)after 6000 cycles,suggesting a promising application in transparent light-driven energy devices.

关 键 词：光电化学性能 太阳光能 电极材料 赝电容 储能器件 对光子 循环测试 异质结 

分 类 号：TQ131.21[化学工程—无机化工] TM53[电气工程—电器]