A fast self-charging and temperature adaptive electrochromic energy storage device

Abstract

Self-charging electrochromic energy storage device has the characteristics of energy storage, energy visualization and energy self-recovery which has attracted extensive attention in recent years. However, due to the slow self-charging...

Novel Prussian White@MnO2-Based Inorganic Electrochromic Energy Storage Devices with Integrated Flexibility, Multicolor, and Long Life

“…From the GCD profiles at different current densities in Figure a, the almost symmetric shape of the charging and discharging branch reflected the good reversibility in a charging and discharging process . Meanwhile, the nonlinear GCD curves also suggested the pseudocapacitor-type charge storage methods for this EESD. , Due to the synergistic effect of two single electrodes, the GCD profile can be performed stably at −2 to 2.5 V, which explained that the EESD can realize stable charging–discharging under a wide potential window . The in situ optical modulation at 510 nm showed consistent reversibility and change trend with the GCD curve.…”

“…57 Meanwhile, the nonlinear GCD curves also suggested the pseudocapacitor-type charge storage methods for this EESD. 25,45 Due to the synergistic effect of two single electrodes, the GCD profile can be performed stably at −2 to 2.5 V, which explained that the EESD can realize stable charging−discharging under a wide potential window. 58 The in situ optical modulation at 510 nm showed consistent reversibility and change trend with the GCD curve.…”

“…24 However, present EESDs with flexible and multicolor performance are mostly based on organic materials and liquid/gel electrolyte such as polyaniline, polypyrrole, and so on. 25,26 Although it is easy for the organic electrode and liquid electrolyte in devices to realize multicolor and a quick response, the poor stability, not environmental-friendly disposal, and packaging difficulty are also unavoidable problems. 27,28 To realize the multicolor display of inorganic ECDs, the composite hybrid electrode composed of different color EC materials may be a useful solution.…”

Towards two-dimensional color tunability of all-solid-state electrochromic devices using carbon dots

“…Through adjusting the content of CDs, ECDs can not only exhibit rich color changes but also improve their electrochemical stability. Significantly, the fabricated ECD can still maintain a stable and reversible color change even in harsh environments where operating temperatures are constantly changing from RT to 70°C ( Lei et al, 2019 ; Liu et al, 2021 ; Wang et al, 2022 ). We envision that our as-obtained ECDs with large charge capacity, multicolor display and high cycle stability can be promising for future color switching/energy storage applications and may also provide new insights into the design of multifunctional electronics.…”

Organic electrochromic energy storage materials and device design

“…Electrochromism refers to the phenomenon of REDOX reaction accompanied by color change or transmittance change, when the material is changed by external voltage or current (Davy et al, 2017;Zhang et al, 2019a;Cai et al, 2020a;Jang et al, 2021). It is very similar to the energy conversion process of energy storage devices, so more and more people are applying electrochromic materials in the field of multifunctional energy storage, which can not only achieve excellent electrochemical performance, but also monitor the status of energy storage devices (Yang et al, 2019;Zhai et al, 2019;Dewan et al, 2022;Wang et al, 2022). There are many functional materials that can achieve electrochromism, such as WO 3 , NiO, TiO 2 , V 2 O 5 and other metal oxides (Zhang et al, 2019b;Kim et al, 2020a;Lee et al, 2020;Shi et al, 2020;Zhou et al, 2020).…”