Intermittent and instantaneous renewable energy is urgently needed to develop intrinsic safe electrical energy storage technology with high power-energy density. Aqueous lithium-ion batteries (ALIBs) are a promising integration due to their nonflammable nature. Nevertheless, restricted by the anode materials, their energy density has a considerable gap from that of their nonaqueous counterparts. Herein, Wadsley-Roth phase niobium-based oxides (M–Nb–O) are attempted for aqueous Li-ion anodes for the first time. By pairing with the representation of the M–Nb–O anode (Zn₂Nb₃₄O₈₇), the output voltage, energy density, and power density of ALIBs increased remarkably, and long-term cycle life improved significantly. Individually, the energy-type full cell (NCM811//Zn₂Nb₃₄O₈₇) yields high-record density energy (191.5 Wh kg^–1) with a high average discharge voltage of ∼2.25 V, and the power-energy type full cell (LiMn₂O₄//Zn₂Nb₃₄O₈₇) exhibits a superior rate capability with a high energy density of 30.0 Wh kg^–1 at an ultrahigh powder density of 16 489 W kg^–1.

中文翻译：

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Wadsley-Roth 相铌基氧化物阳极有望成为高功率和能量密度的水系锂离子电池

迫切需要间歇性和瞬时性的可再生能源来开发具有高功率能量密度的本质安全电能存储技术。水性锂离子电池 (ALIB) 由于其不易燃的特性，是一种很有前途的集成。然而，受负极材料的限制，它们的能量密度与非水相材料有相当大的差距。在此，Wadsley-Roth 相铌基氧化物 (M-Nb-O) 首次尝试用于水系锂离子负极。通过与 M-Nb-O 阳极（Zn ₂ Nb ₃₄ O ₈₇)，ALIBs的输出电压、能量密度和功率密度显着提高，长期循环寿命显着提高。单独而言，能量型全电池（NCM811//Zn ₂ Nb ₃₄ O ₈₇）产生高密度能量（191.5 Wh kg ^-1），平均放电电压高达~2.25 V，而功率型全电池电池 (LiMn ₂ O ₄ //Zn ₂ Nb ₃₄ O ₈₇ )在 16 489 W kg ^{–1的超高粉末密度下表现出优异的倍率性能，具有 30.0 Wh kg –1}的高能量密度。