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Cation‐intercalated vanadates, which have considerable promise as the cathode for high‐performance potassium metal batteries (PMBs), suffer from structural collapse upon K+ insertion and desertion. Exotic cations in the vanadate cathode may ease the collapse, yet their effect on the intrinsic cation remains speculative. Herein, a stable and dendrite‐free PMB, composed of a Na+ and K+ co‐intercalated...
Previously, heat treatment was the only feasible route for tuning the crystal phases of niobium pentoxide (Nb2O5). With the use of Nb2CTx MXene precursors, the first case of phase tuning of Nb2O5 in the low‐temperature hydrothermal synthesis using sulfuric acid regulating agents is presented. By varying the amount of the agent, four pure‐phase Nb2O5 crystals and mixed phases in‐between are obtained...
Carbon nanostructures supported semiconductors are common in photocatalytic and photoelectrochemical applications, as it is expected that the nanoconductors can improve the spatial separation and transport of photogenerated charge carriers. Transfer of charge carriers through the carbon‐semiconductor interface is the key electronic process, which determines the role of charge separation channels,...
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