Application of hard ceramic materials B4C in energy storage: Design B4C@C core-shell nanoparticles as electrodes for flexible all-solid-state micro-supercapacitors with ultrahigh cyclability. (September 2020)

• Record Type: Journal Article
• Authors: Chang, Yukai; Sun, Xiaohui; Ma, Mengdong; Mu, Congpu; Li, Penghui; Li, Lei; Li, Mengzhu; Nie, Anmin; Xiang, Jianyong; Zhao, Zhisheng; He, Julong; Wen, Fusheng; Liu, Zhongyuan; Tian, Yongjun
• Is Part Of: Nano energy. Volume 75(2020)
• Publication Date: 2020-09
• Subjects: Core-shell structure -- B4C@C -- Hard ceramic materials -- Micro-supercapacitors -- Energy storage; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.104947
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: B4 C is widely known by a series of unique advantages, such as low density, high hardness, good chemical stability and excellent environmental stability, as a hard ceramic material. However, the study of B4 C as the electrode material on micro-electrochemical energy storage devices has not yet been reported. To some extent, the poor conductivity of B4 C is an important reason to limit its extensive application in energy storage field. Here, we first report an elaborated design B4 C@C of core-shell structure by simple vacuum heating synthesis strategy as electrodes for flexible all-solid-state micro-supercapacitors (MSCs) with the method of mask assisted-vacuum filtration. Notably, the B4 C@C-MSCs exhibit outstanding electrochemical performances, such as high areal capacitance of 7.33 mF cm −2, remarkable cycling stability with 100.94% capacitance retention after 50000 cycles, wide operating temperature range (−25 to 75 °C), excellent mechanical flexibility without obviously performance degradation under different bending states, distinguished environmental stability and superior integration. These results suggest that the hard ceramic materials B4 C have a promising prospect in micro-electrochemical energy storage devices. Graphical abstract: Image 1 Highlights: Hard ceramic materials B4 C are first used for Electrodes in flexible all-solid-state micro-supercapacitors. Elaborated design of core-shell structure and small grain size endow with B4 C an obvious advantage in energy storage. Highly conductive graphene was used to serve as metal-free current collectors and the electrode parameters are optimized. B4 C@C micro-supercapacitor device possess outstanding electrochemical performances, such as wide operating temperature range.