High-Performance Aqueous Zinc-Manganese Battery with Reversible Mn(2+)/Mn(4+) Double Redox Achieved by Carbon Coated MnO(x) Nanoparticles.
High-Performance Aqueous Zinc-Manganese Battery with Reversible Mn(2+)/Mn(4+) Double Redox Achieved by Carbon Coated MnO(x) Nanoparticles.
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碳包覆MnOx纳米颗粒实现可逆Mn2/Mn4双氧化还原的高性能水系锌锰电池
DOI：
10.1007/s40820-020-00445-x
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发表时间：
2020-05-13
影响因子：
26.6
通讯作者：
Liu J
中科院分区：
文献类型：
--
作者：
Huang J;Zeng J;Zhu K;Zhang R;Liu J
通过碳包覆的MnOx纳米颗粒实现了具有可逆Mn 2 +/Mn 4+双重氧化还原的水溶液锌锰电池。与含Mn 2+的电解质结合，MnOx阴极实现了峰值为845.1 Wh kg−1的超高能量密度和1500次循环的超长寿命。结合电化学测试和材料表征，系统地讨论了电极行为和反应机理。本文的在线版本（10.1007/s40820-020-00445-x）包含补充材料，可供授权用户使用。迫切需要低成本、高能量密度、环境友好的能量存储装置来满足对电能存储的快速增长的需求。多电子氧化还原是高能量密度阴极发展的关键。在这里，我们提出了具有可逆Mn 2 +/Mn 4+双氧化还原的高性能水溶液锌锰电池。活性Mn 4+由含Mn 2+的MnOx纳米颗粒和电解质原位产生。得益于水钠锰矿型MnO 2的低结晶度以及具有Mn 2+添加剂的电解质，MnOx阴极实现了峰值为845.1 Wh kg-1的超高能量密度和1500次循环的超长寿命。电化学测量和材料表征的组合揭示了可逆的Mn 2 +/Mn 4+双氧化还原（水钠锰矿型MnO 2参与单斜MnOOH和尖晶石ZnMn 2 O 4参与Mn 2+离子）。可逆的Mn 2 +/Mn 4+双氧化还原电极反应机理为设计用于先进可充电水溶液电池的低成本、高能量密度阴极提供了新的机会。本文的在线版本（10.1007/s40820-020-00445-x）包含补充材料，可供授权用户使用。
Aqueous zinc-manganese batteries with reversible Mn2+/Mn4+ double redox are achieved by carbon-coated MnOx nanoparticles. Combined with Mn2+-containing electrolyte, the MnOx cathode achieves an ultrahigh energy density with a peak of 845.1 Wh kg−1 and an ultralong lifespan of 1500 cycles. The electrode behaviors and reaction mechanism are systematically discussed by combining electrochemical measurements and material characterization. The online version of this article (10.1007/s40820-020-00445-x) contains supplementary material, which is available to authorized users. There is an urgent need for low-cost, high-energy-density, environmentally friendly energy storage devices to fulfill the rapidly increasing need for electrical energy storage. Multi-electron redox is considerably crucial for the development of high-energy-density cathodes. Here we present high-performance aqueous zinc–manganese batteries with reversible Mn2+/Mn4+ double redox. The active Mn4+ is generated in situ from the Mn2+-containing MnOx nanoparticles and electrolyte. Benefitting from the low crystallinity of the birnessite-type MnO2 as well as the electrolyte with Mn2+ additive, the MnOx cathode achieves an ultrahigh energy density with a peak of 845.1 Wh kg−1 and an ultralong lifespan of 1500 cycles. The combination of electrochemical measurements and material characterization reveals the reversible Mn2+/Mn4+ double redox (birnessite-type MnO2 ↔ monoclinic MnOOH and spinel ZnMn2O4 ↔ Mn2+ ions). The reversible Mn2+/Mn4+ double redox electrode reaction mechanism offers new opportunities for the design of low-cost, high-energy-density cathodes for advanced rechargeable aqueous batteries. The online version of this article (10.1007/s40820-020-00445-x) contains supplementary material, which is available to authorized users.
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影响因子：
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