AUTHOR=Liu Yong , Zhai Xiaoliang , Yang Keke , Wang Fei , Wei Huijie , Zhang Wanhong , Ren Fengzhang , Pang Huan 

TITLE=Mesoporous NH4NiPO4·H2O for High-Performance Flexible All-Solid-State Asymmetric Supercapacitors

JOURNAL=Frontiers in Chemistry

VOLUME=7

YEAR=2019

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2019.00118

DOI=10.3389/fchem.2019.00118

ISSN=2296-2646

ABSTRACT=<p>Nowadays, wearable energy storage devices have been growing rapidly, but flexible systems with both excellent cycling stability and decent flexibility are still challenging. In this work, a flexible all-solid-state NH<sub>4</sub>NiPO<sub>4</sub>·H<sub>2</sub>O//graphene supercapacitor with remarkable performance was successfully assembled. When cycled at a current density of 5 mA cm<sup>−2</sup>, the device delivered 121 mF cm<sup>−2</sup>, and showed good cycling stability after 3,000 cycles. Moreover, the all-solid-state NH<sub>4</sub>NiPO<sub>4</sub>·H<sub>2</sub>O//graphene supercapacitor also exhibit high mechanical flexibility with well-maintained specific capacitance, even under bending to arbitrary angles (up to 180°) and different weights (up to 50 g).</p>