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首页> 外文期刊>Advanced functional materials >Multiple-Scale Probing of Intrinsic Active Sites and Reaction Kinetics in Processable Cation-Inserted Nickel Hydroxide Films
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Multiple-Scale Probing of Intrinsic Active Sites and Reaction Kinetics in Processable Cation-Inserted Nickel Hydroxide Films

机译：Multiple-Scale Probing of Intrinsic Active Sites and Reaction Kinetics in Processable Cation-Inserted Nickel Hydroxide Films

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摘要

Nanoplate-shaped Ni(OH)_2 with numerous exposed active sites hold muchpromise for high-performance energy storage devices. However, restricted bythe wide band gap, which leads to a low concentration of charge carrier, theenergy barrier of electron mobility in lattice plane is high, further inhibitingthe electron transfer and their practical application. Here, several unique processablenickel-based hydroxide films are constructed via the cation-insertedstrategy to probe the intrinsic relationship between component and electronicmicro-structure. Benefiting from the component-driven effects, the concentrationof charge carrier at the lattice plane can be accumulated after injectingheterogeneous cations, and the fastened dynamics process can be realizedand confirmed by multiple real-time operando techniques. Meanwhile, themore well-matched Co core rather than Mn core in Ni(OH)2 is also certified.Finally, the Co-Ni(OH)_2 electrode achieves 623 C g~(–1) @1 A g~(–1) withoutany conductivity additives and binders, which is nearly threefold that ofpristine Ni(OH)2. This work clarifies the critical role of inserted cations, andcorresponding electron and electrolyte ion transfer across the matrix, thusenabling a better guideline for Ni(OH)2-based energy storage/conversionsystems.

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