journal homepage: www.elsevier.com/locate/nanoenergy Available online at www.sciencedirect.com RAPID COMMUNICATION An “all-in-one” mesh-typed integrated energy unit for both photoelectric conversion and energy storage in uniform electrochemical system Chenglong Shi a , Hui Dong c , Rui Zhu a,b , Heng Li a , Yichen Sun a , Dongsheng Xu c , Qing Zhao a,b,n , Dapeng Yu a,b,n a State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, PR China b Collaborative Innovation Center of Quantum Matter, Beijing, PR China c State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China Received 28 January 2015; received in revised form 9 March 2015; accepted 20 March 2015 KEYWORDS Solar cells; Supercapacitors; Integrated device; Mesh-type; Mono electrolyte; All-in-one Abstract An “all-in-one” mesh typed integrated energy unit is developed which converts solar energy to electric energy and stores it simultaneously. The entire integrated device operates in uniform electrolyte system which contains 0.8 M Na 2 S, 0.8 M S, and 2 M KCl. A double-sided mesh electrode coated with Cu 2 S film and carbon nanoparticles is shared by both energy conversion and storage sections. The device we fabricated can realize the co-operation of the energy conversion and storage sections effectively by taking advantages of the mono electrolyte system and the shared double-sided mesh-typed electrode. These properties are beneficial to assembly, miniaturization, and integration of a self-powered system for portable microelec- tronic devices. & 2015 Elsevier Ltd. All rights reserved. Introduction Renewable energy resource has attracted great scientific and technological attention due to the sustainable development in the future. Among the variety of energy generation devices http://dx.doi.org/10.1016/j.nanoen.2015.03.032 2211-2855/& 2015 Elsevier Ltd. All rights reserved. n Corresponding authors at: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, PR China. Tel./fax: + 86 10 62753673. E-mail addresses: zhaoqing@pku.edu.cn (Q. Zhao), yudp@pku.edu.cn (D. Yu). Nano Energy (]]]]) ], ]]]–]]] Please cite this article as: C. Shi, et al., An “all-in-one” mesh-typed integrated energy unit for both photoelectric conversion and energy storage in uniform electrochemical system, Nano Energy (2015), http://dx.doi.org/10.1016/j.nanoen.2015.03.032