Super‐Fast and Super‐Long‐Life Rechargeable Zinc Battery

Abstract

Despite their low cost, safety, environmentally friendliness, and intrinsic non‐flammable nature, the widespread application of aqueous rechargeable zinc‐based batteries has been held back by their low coulombic efficiency and the notorious dendritic growth at the zinc‐based anodes, along with the fast capacity fading of the cathodes. Herein, an aqueous Zn superbattery that consists of a mixed ZnCO3 MnCO3 grafted onto a graphene aerogel (ZMG) negative electrode and a nanotubular sulfidated NiCoFe layered double hydroxide (LDHS) positive electrode is reported. The alkaline ZMG││LDHS superbattery delivers an excellent capacity and a superb rate capability (356 mA h g−1cathode (89 mA h g−1total mass) at 12 A g−1; 108 mA h g−1cathode at 300 A g−1), extremely high specific energy and power (568 W h kg−1cathode or 15.8 mW h cm−3, 429 kW kg−1cathode or 11.9 W cm−3), along with a high output voltage (1.8 V). The device also exhibits unprecedented cycling stability (99.2% capacity retention after 17,000 cycles at 100% depth of discharge) thanks to an electrochemical pulse‐driven regenerative mechanism.

Fishing Net‐Inspired Mutiscale Ionic Organohydrogels with Outstanding Mechanical Robustness for Flexible Electronic Devices

“…Using two charged supercapacitors connected in series, a light emitting diode (LED) was successfully lightened (Video S5, Supporting Information), indicating the powering ability of the supercapacitor similar to that of batteries. [ 23 ] Moreover, the supercapacitor also powered a LED even under harsh mechanical conditions, including bending, folding, squeezing and harmmering (Figure 5f, Videos S6 and S7, Supporting Information). The excellent robustness enables such supercapacitors reliable power source in diverse mechanical and temperature conditions.…”

Recent progress of dendrite‐free stable zinc anodes for advanced zinc‐based rechargeable batteries: Fundamentals, challenges, and perspectives

“…For instance, graphene aerogel decorated with mixed ZnCO 3 MnCO 3 (ZMG) assembled with a nanotubular sulfidated Ni–Co–Fe‐layered double hydroxide (LDHS) contributed to the successful establishment for “rocking‐chair” ZBs based on the alkaline electrolyte (Figure 4H). 102 As a consequence, the constructed ZBs not only delivered a comparable specific capacity of 89 mA h/g at 12 A/g, a rate capability of 27 mA h/g at 300 A/g, and an extremely high working potential of 1.8 V but also showed an unprecedented capacity retention of 96% after 17 000 cycles with a high discharge depth of 100%, owing to the electrochemical pulse‐driven regenerative mechanism. In KOH electrolyte, this superbattery exhibited a working voltage window of 1.1 V (Figure 4I), ascribed to the both capacitive and battery‐like energy storage processes.…”

Microbe‐Mediated Biosynthesis of Multidimensional Carbon‐Based Materials for Energy Storage Applications

“…[226][227][228] However, the relatively low energy density and poor cycling stability and inferior power capability become the main problem hindering further application. [229,230] As well known, the energy density (E, Wh kg −1 ) of ZIBs is determined by specific capacity (mAh g −1 ) and output voltage (V). [231] In view of certain redox potential and capacity of zinc metal anode, the energy density of ZIBs mainly depends on cathodes materials based on various system.…”