A carbon dot-based total green and self-recoverable solid-state electrochemical cell fully utilizing H_(2)O_(2)redox couple  

作　　者：Zhaomin Chen Xiaoqing Gu Yutong Guo Xin Wang Mingwang Shao Bin Dong Zhenhui Kang 

机构地区：[1]Institute of Functional Nano and Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Soochow University,Suzhou,China [2]Macao Institute of Materials Science and Engineering,Macao University of Science and Technology,Taipa,Macao,SAR,China

出　　处：《SusMat》2021年第3期448-457,共10页可持续发展材料（英文）

基　　金：National Key Research and Development Program of China,Grant/Award Num-bers:2018YFE0306105,2020YFA0406104,2020YFA0406101;National Natural Sci-ence Foundation of China,Grant/Award Numbers:21574094,51821002,51725204,21771132,51972216,52041202;Natural Sci-ence Foundation of Jiangsu Province,Grant/Award Number:BK20190041;Col-laborative Innovation Center of Suzhou Nano Science&Technology;111 Project,Joint International Research Laboratory of Carbon-Based Functional Materials and Devices;the Fund for Excellent Creative Research Teams of Jiangsu Higher Educa-tion Institutions;Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University。

摘　　要：Electrochemical cell can overcome the inherent intermittence of the renewable energy sources,thus showing great potentials in applications ranging from elec-trical energy storage to future smart grid.However,the current electrochemical cells could not achieve the“total green”feature by fully utilizing the clean and abundant O_(2)/H_(2)O redox couples due to the enormous overpotentials for both oxygen reduction reaction(ORR)and oxygen release reaction(OER).Herein,we report a“total green”electrochemical composite film cell based on carbon dots(CDots),which can realize both ORR and OER in the acid environment.The in-air voltage generation(0.95 V,with a maximum power of 5.3μW)relies on the multiple-electron-transfer redox chemical reaction between the two active components inside the composite film,that is,ORR/OER of CDots and the redox reaction of polyaniline(PANI)on the electrode and the resulting proton concentration gradient.Interestingly,the cell can be self-recovered at low load,recharged by adding H_(2)O_(2),or electrocharged at high load.We anticipate that current study may open up new opportunities for designing and developing total-green energy storage and conversion systems for diverse applications.

关 键 词：carbon dots electron/proton transfer O_(2)/H_(2)O redox couples total green electrochemical cell 

分 类 号：O64[理学—物理化学]