Paper-based aqueous Al ion battery with water-in-salt electrolyte

作     者：Yifei Wang Wending Pan Kee Wah Leong Yingguang Zhang Xiaolong Zhao Shijing Luo Dennis Y.C.Leung Yifei Wang;Wending Pan;Kee Wah Leong;Yingguang Zhang;Xiaolong Zhao;Shijing Luo;Dennis Y.C.Leung

作者机构：School of Mechanical Engineering and AutomationHarbin Institute of TechnologyShenzhen518055China Department of Mechanical EngineeringThe University of Hong KongHong KongChina 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2023年第8卷第5期

页      面：1380-1388页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：The authors would like to acknowledge the CRF grant of the Hong Kong Research Grant Council(C5031-20G) the CRCG grant of the University of Hong Kong(201910160008) the research start-up fund of Harbin Institute of Technology,Shenzhen(CA45001039)for providing funding support to this project 

主　　题：Al ion battery Aqueous electrolyte Water-in-salt Paper battery Flexible battery 

摘      要：Low-cost,flexible and safe battery technology is the key to the widespread usage of wearable electronics,among which the aqueous Al ion battery with water-in-salt electrolyte is a promising *** this work,a flexible aqueous Al ion battery is developed using cellulose paper as *** water-in-salt electrolyte is stored inside the paper,while the electrodes are either printed or attached on the paper surface,leading to a lightweight and thin-film battery ***,this battery can tolerate a charge and discharge rate as high as 4 A g^(-1) without losing its storage *** charge voltage is around 2.2 V,while the discharge plateau of 1.6–1.8 V is among the highest in reported aqueous Al ion batteries,together with a high discharge specific capacity of~140 mAh g^(-1).However,due to the water electrolysis side reaction,the faradaic efficiency can only reach 85%with a cycle life of 250 due to the dry out of *** from using flexible materials and aqueous electrolyte,this paper-based Al ion battery can tolerate various deformations such as bending,rolling and even puncturing without losing its *** two single cells are connected in series,the battery pack can provide a charge voltage of 4.3 V and a discharge plateau as high as 3–3.6 V,which are very close to commercial Li ion *** a cheap,flexible and safe battery technology may be widely applied in low-cost and large-quantity applications,such as RFID tags,smart packages and wearable biosensors in the future.