title: Trace H2 O2 -Assisted High-Capacity Tungsten Oxide Electrochromic Batteries with Ultrafast Charging in Seconds.
abstract: A recent technological trend in the field of electrochemical energy storage is to integrate energy storage and electrochromism functions in one smart device, which can establish efficient user-device interactions based on a friendly human-readable output. This type of newly born energy storage technology has drawn tremendous attention. However, there is still plenty of room for technological and material innovation, which would allow advancement of the research field. A prototype Al-tungsten oxide electrochromic battery with interactive color-changing behavior is reported. With the assistance of trace amount of H2 O2 , the battery exhibits a specific capacity almost seven times that for the reported electrochromic batteries, up to 429 mAh g(-1) . Fast decoloration of the reduced tungsten oxide affords a very quick charging time of only eight seconds, which possibly comes from an intricate combination of structure and valence state changes of tungsten oxide. This unique combination of features may further advance the development of smart energy storage devices with suitability for user-device interactions.
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.|Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China.
authors.forename: Jinxiong
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.
authors.forename: Yuyu
authors.initials: Y
authors.lastname: Tian
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Cong
authors.affiliation: Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China.
authors.forename: Di
authors.initials: D
authors.lastname: Zhou
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.|Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China.
authors.forename: Qingzhu
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.|Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Yang
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China.
authors.forename: Weikun
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
authors.forename: Fengxia
authors.initials: F
authors.lastname: Geng
authors.affiliation: Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou Industrial Park, Suzhou, 215123, China. zgzhao2011@sinano.ac.cn.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zhao
keywords: aluminum chloride electrolytes; electrochromic batteries; hydrogen peroxide; rechargeable batteries; tungsten oxide electrode