A smart flexible supercapacitor enabled by a transparent electrochromic electrode composed of W₁₈O₄₉ nanowires/rGO composite films

Abstract

Benefitting from smart structural configuration, the W18O49 NWs/rGO composite based smart supercapacitor achieved high capacitance properties, excellent stability, and high sustainability in optical modulation (96%) is promising for real applications.

Recent progress in the development of smart supercapacitors

“…Electrochromism, a phenomenon in which a material's color changes reversibly under an applied voltage, was first proposed by Platt 54 in the 1960s. Supercapacitors with electrochromic functions prepared from electrochromic materials can directly display the capacity of their energy storage through color changes, eliminating the need to connect additional instruments to visualize the remaining energy value 32 . The electrode materials for supercapacitors are generally carbon materials, metal oxides, and conductive polymers.…”

“…Supercapacitors with electrochromic functions prepared from electrochromic materials can directly display the capacity of their energy storage through color changes, eliminating the need to connect additional instruments to visualize the remaining energy value. 32 The electrode materials for supercapacitors are generally carbon materials, metal oxides, and conductive polymers. As the energy storage mode of carbon material is mainly to produce a double layer, no chemical reaction occurs, the color is single (black), and there is no electrochromic ability.…”

“…W 18 O 49 /rGO electrochromic electrode. Reproduced with permission: Copyright 2022, Royal Society of Chemistry 32 …”

“…Compared with traditional supercapacitors, intelligent supercapacitors not only have all the characteristics of traditional capacitors (high power density, long cycle life, fast charging speed, and good rate performance) but also give them special functions by designing and regulating their electrode components and structures to meet the intelligence requirements in different environmental applications (Figure 1). [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] In recent years, researchers have also performed a lot of research work on smart supercapacitors and made great progress. [39][40][41][42][43][44][45][46][47] For example, an electrochromic smart supercapacitor, 39 that is, through the change in the color of the energy storage device, is used to visualize the amount of residual power of a device.…”

Enhanced dual-band modulation of visible and near-infrared light transmittance in electrochromic composite films based on Preyssler-type polyoxometalates and W18O49

“…14,15 Therefore, the NIR absorption properties of W 18 O 49 make it an effective candidate in various applications, such as photocatalysts, 16 gas sensors, 17 field-emission performance, 18,19 and EC devices. 20,21 Many studies have focused on W 18 O 49 , including both fundamental studies and application-oriented studies. Further improvement of the EC properties of W 18 O 49 is an important research direction.…”