The increasing interest in future energy storage technologies has generated the urgent need for alternative rechargeable magnesium ion batteries due to their innate merits in terms of raw abundance, theoretical capacity, and operational safety. Herein, we report an alternative pathway to a new energy storage regime: toward advanced rechargeable magnesium-ion batteries based on WSe2 nanowire-assembled film cathodes. The as-grown electrodes delivered efficient Mg(2+) intercalation/insertion activity, excellent cycling life, enhanced specific capacity, and excellent rate capability. We also evaluated the influence of Mg-intercalation behavior on Mg-ion batteries based on WSe2 film cathodes via the first-principles DFT computations. The results reveal the feasibility of using advanced magnesium-ion batteries based on WSe2 film as energy storage components in next-generation optoelectronic systems.
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