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The sluggish ionic transport in thick electrodes and freezing electrolytes has limited electrochemical energy storage devices in lots of harsh environments for practical applications. Here, a 3D‐printed proton pseudocapacitor based on high‐mass‐loading 3D‐printed WO3 anodes, Prussian blue analog cathodes, and anti‐freezing electrolytes is developed, which can achieve state‐of‐the‐art electrochemical...
Conventional cathodes of Li‐ion batteries mainly operate through an insertion–extraction process involving transition metal redox. These cathodes will not be able to meet the increasing requirements until lithium‐rich layered oxides emerge with beyond‐capacity performance. Nevertheless, in‐depth understanding of the evolution of crystal and excess capacity delivered by Li‐rich layered oxides is insufficient...
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