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Electrocatalytic water splitting is regarded as the most effective pathway to generate green energy—hydrogen—which is considered as one of the most promising clean energy solutions to the world's energy crisis and climate change mitigation. Although electrocatalytic water splitting has been proposed for decades, large‐scale industrial hydrogen production is hindered by high electricity cost, capital...
Potassium‐ion hybrid capacitors (PIHCs) have been considered as an emerging device to render grid‐scale energy storage. Nevertheless, the sluggish kinetics at the anode side and limited capacity output at the cathode side remain daunting challenges for the overall performances of PIHCs. Herein, an exquisite “homologous strategy” to devise multi‐dimensional N‐doped carbon nanopolyhedron@nanosheet anode...
Aqueous supercapacitors have the superiorities of high safety, environmental friendliness, inexpensive, etc. High energy density supercapacitors are not conducive to manufacturing due to the limitation of water thermodynamic decomposition potential, resulting in a narrow working voltage window. To address such challenges, a great endeavor has started to investigate high voltage aqueous supercapacitors...
Rechargeable aqueous proton batteries are promising competitors for the next generation of energy storage systems with the fast diffusion kinetics and wide availability of protons. However, poor cycling stability is a big challenge for proton batteries due to the attachment of water molecules to the electrode surface in acid electrolytes. Here, a hydrogen‐bond disrupting electrolyte strategy to boost...
The rechargeable magnesium battery (RMB) is regarded as a high‐energy, safe, and cost‐effective alternative for conventional batteries. Unfortunately, the passivation and uneven Mg growth not only raise the voltage hysteresis but also shorten the cycle life of RMBs. In this review, Mg passivation induced by electrolytes/contaminants, growth patterns of high dimensional Mg0, and mechanisms of Mg anode...
Metal–sulfur batteries exhibit great potential as next‐generation rechargeable batteries due to the low sulfur cost and high theoretical energy density. Sodium–sulfur (Na–S) batteries present higher feasibility of long‐term development than lithium–sulfur (Li–S) batteries in technoeconomic and geopolitical terms. Both lithium and sodium are alkali metal elements with body‐centered cubic structures,...
Proton electrochemistry is promising for developing post‐lithium energy storage devices with high capacity and rate capability. However, some electrode materials are vulnerable because of the co‐intercalation of free water molecules in traditional acid electrolytes, resulting in rapid capacity fading. Here, the authors report a molecular crowding electrolyte with the usage of poly(ethylene glycol)...
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