An overview of deep eutectic solvents: Alternative for organic electrolytes, aqueous systems & ionic liquids for electrochemical energy storage

Sustainable stretchable batteries for next-generation wearables

“…190 However, recent reports have put into question the true sustainability of DESs in terms of their production methods and their environmental and human impact. 191–193 Thus it presents an opportunity to develop new sustainable electrolyte systems for stretchable batteries.…”

Improved Electrochemical Performance of Aqueous Hybrid Supercapacitors Using CrCo2O4 Mesoporous Nanowires: An Innovative Strategy toward Sustainable Energy Devices

“…Electrochemical energy storage (EES) systems possess widespread implications in medical, electronics, and smart gadgets. − In recent years, a variety of batteries and supercapacitors (SCs) have emerged as promising candidates in EES devices. − Although these emerging technologies can store and produce sufficient energy, batteries and SCs suffer from certain limitations. Recently, scientists have developed different types of EES systems including Li-ion batteries and Zn-ion batteries. , Currently, batteries encounter issues of limited power density, limited lifespan, and low charging speed, together with the widespread use of environmentally unfriendly electrolytes. , Although SCs meet the requirements of charging speed as well as power density, their low energy issues, which are far inferior to conventional batteries, , are inherent limitations. An intuitive approach to achieving appropriate energy density and power density is to combine efficient energy storing devices within a single electrochemical system .…”

Bicontinuous Ionogel Electrolyte with Conductive Nanochannels for Flexible Supercapacitors

“…In contrast, ionogels with solvent components being ionic liquids (ILs) exhibit extraordinary antifreezing capability and thermal stability. − These properties render ionogels a promising alternative to hydrogel for the fabrication of flexible ionotronics. − However, most reported ionogels present relatively poor mechanical properties, − such as fracture strength <1 MPa, Young’s modulus <0.1 MPa, and fracture energy <1000 J/m 2 . To date, various strategies including introduction of energy dissipation structure and nanocomposites have been proposed to improve ionogels’ mechanical performances. ,− Among them, the energy dissipation mechanism (sacrificial bond theory) is considered as an effective way to produce toughness and has been well established in hydrogels. , Referring to the hydrogel system, the mechanical strength and toughness of ionogels are largely improved by designing and constructing an energy dissipation structure.…”