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首页> 外文期刊>Journal of power sources >Design of nickel cobalt oxide and nickel cobalt oxide@nickel molybdenum oxide battery-type materials for flexible solid-state battery supercapacitor hybrids
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Design of nickel cobalt oxide and nickel cobalt oxide@nickel molybdenum oxide battery-type materials for flexible solid-state battery supercapacitor hybrids

机译：柔性固态电池超级电容器混合动力用镍钴氧化物和镍钴氧化物@镍钼钼电池类型材料的设计

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摘要

The flexible solid-state battery supercapacitor hybrid (SBS) is one of the promising energy storage devices for wearable electronic devices. Surface properties of active materials play important roles on electrolyte/active material interaction and energy storage ability. This work applies nickel cobalt oxide (NiCo2O4) and nickel cobalt oxide@nickel molybdenum oxide (NiCo2O4@NiMoO4) as the active material for SBS. Effects of structure directing agents (SDA) and substrates on surface properties and energy storage abilities of active materials are investigated. SDA has less influence on active material morphology while Ni foam with higher electrical conductivity is preferable as substrate. The best energy storage ability is obtained for SBS with NiCo2O4@NiMoO4 electrode prepared using ammonium fluoride with capacity of 0.68 mAh/cm(2) and the maximum energy density of 70.78 Wh/kg at 3.25 kW/kg. Excellent bending ability for the device with nearly no capacitance decay under 150 bending is attained. Capacitance retention of 80% and Coulombic efficiency of higher than 95% are achieved for SBS measured in 5000 times charging/discharging process. This work firstly relates surface property of active materials to energy storage ability of SBS. It is expected that more efficient active materials and better energy storage ability can be eventually achieved by understanding effects of synthesizing parameters.
机译：柔性固态电池超级电容器混合动力（SBS）是可穿戴电子设备中有希望的储能设备之一。活性材料的表面性质对电解质/活性材料的相互作用和能量存储能力起着重要作用。这项工作应用了氧化镍钴（NiCo2O4）和氧化镍钴@氧化钼镍（NiCo2O4 @ NiMoO4）作为SBS的活性材料。研究了结构导向剂（SDA）和基质对活性材料表面性能和储能能力的影响。 SDA对活性材料形态的影响较小，而优选具有较高电导率的Ni泡沫作为基材。对于使用氟化铵制备的NiCo2O4 @ NiMoO4电极，SBS具有最佳的储能能力，其容量为0.68 mAh / cm（2），最大能量密度为3.25 kW / kg，为70.78 Wh / kg。该器件具有出色的弯曲能力，在150次弯曲下几乎没有电容衰减。在5000次充/放电过程中测得的SBS的电容保持率达到80％，库仑效率高于95％。这项工作首先将活性材料的表面性质与SBS的储能能力相关联。期望通过了解合成参数的效果最终可以实现更有效的活性材料和更好的能量存储能力。

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