首页|Inhibiting the phase transition of WO3 for highly stable aqueous electrochromic battery

Inhibiting the phase transition of WO3 for highly stable aqueous electrochromic battery

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Aqueous electrochromic battery(ECB)has shown intense potential for achieving energy storage and sav-ing simultaneously.While tungsten oxide(WO3)is the most promising EC material for commercializa-tion,the cycling stability of WO3-based aqueous ECBs is currently unsatisfactory due to the repeated phase transition during the redox process and the corrosion by acidic electrolytes.Herein,we present a titanium-tungsten oxide alloy(Ti-WO3)with controllable morphology and crystal phase synthesized by a facile hot injection method to overcome the challenges.In contrast to conventional monoclinic WO3,the Ti-WO3 nanorods can stably maintain their cubic crystal phase during the redox reaction in an acidic electrolyte,thus leading to dramatically enhanced response speed and cycling stability.Specifically,when working in a well-matched hybrid AI3+/Zn2+aqueous electrolyte,our phase-transition-free cubic Ti-WO3 exhibits an ultra-high cycling stability(＞20000 cycles),fast response speed(3.95 s/4.65 s for bleaching/coloring),as well as excellent discharge areal capacity of 214.5 mA h m-2.We further fabricate a fully complementary aqueous electrochromic device,for the first time,using a Ti-WO3/Prussian blue device architecture.Remarkably,the complementary ECB shows＞10000 stable operation cycles,attesting to the feasibility of our Ti-WO3 for practical applications.Our work validates the signif-icance of inhibiting the phase transitions of WO3 during the electrochromic process for realizing highly cyclable aqueous ECB,which can possibly provide a generalized design guidance for other high-quality metallic oxides for electrochemical applications.

Aqueous electrochromic batteryTi-WO3Phase transitionLong-term stability

Zhisheng Wu、Zhendong Lian、Ting Ding、Jielei Li、Jincheng Xu、Jinxiao Wang、Liangxing Zhang、Bo Wang、Shi Chen、Peng Xiao、Hua Xu、Shuang-Peng Wang、Kar Wei Ng

展开 >

Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Macao 999078,China

School of Applied Physics and Materials,Wuyi University,Jiangmen 529020,Guangdong,China

Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology,School of Physics and Optoelectronic Engineering,Foshan University,Foshan 528225,Guangdong,China

Guangzhou New Vision Optoelectronic Technology Co.,Ltd.,Guangzhou 510530,Guangdong,China

展开 >

Science and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARScience and Technology Development Fund,Macao SARMulti-Year Research Grants from the University of MacauMulti-Year Research Grants from the University of MacauGuangdong Science and Technology PlanMajor Science and Technology Research and Development Project of Jiangxi Province

0052/2021/AGJ0027/2023/AMJ0083/2023/ITP20107/2023/AFJMYRG2022-00063-IAPMEMYRG-GRG2023-00230-IAPME-UMDF2022A050502002220223AAE01003

2024

10.1016/j.jechem.2024.03.029

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.95(8)