Potassium pre-inserted K1.04Mn8O16 as cathode materials for aqueous Li-ion and Na-ion hybrid capacitors
Potassium pre-inserted K1.04Mn8O16 as cathode materials for aqueous Li-ion and Na-ion hybrid capacitors
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DOI：
10.26434/chemrxiv.9791477.v1
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发表时间：
2019-09
影响因子：
13.1
通讯作者：
Yamin Zhang;Lina Chen;Chongyang Hao;Xiaowen Zheng;Yixuan Guo;Long Chen;Kangrong Lai;Yinghe Zhang;L. Ci
中科院分区：
文献类型：
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作者：
Yamin Zhang;Lina Chen;Chongyang Hao;Xiaowen Zheng;Yixuan Guo;Long Chen;Kangrong Lai;Yinghe Zhang;L. Ci
针对水溶液锂离子混合电容器和钠离子混合电容器的应用，将钾离子预先插入到MnO 2隧道结构中，通过高温固相反应制备了由纳米颗粒和纳米棒组成的K1. 04 Mn 8 O 16材料。对所制备的材料进行了深入的研究，并显示出优异的电化学性能。以商用活性炭（YEC-8A）为阳极，K1.04Mn8O16为阴极，组装了混合型超级电容器。它具有高能量密度和功率密度。锂离子电容器在99.86 W kg-1的功率密度下达到127.61 Wh kg-1的高能量密度，钠离子电容器在133.79 W kg-1下获得170.96 Wh kg-1。此外，混合超级电容器表现出优异的循环性能，在10，000次循环后，锂离子电容器的电容保持率为97%，钠离子电容器的电容保持率为85%。
For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors, potassium ions are pre-inserted into MnO2 tunnel structure, the as-prepared K1.04Mn8O16 materials consist of nanoparticles and nanorods were prepared by facile high-temperature solid-state reaction. The as-prepared materials were well studied andthey show outstanding electrochemical behavior. We assembled hybrid supercapacitors with commercial activated carbon (YEC-8A) as anode and K1.04Mn8O16 as cathode. It has high energy densities and power densities. Li-ion capacitors reach a high energy density of 127.61 Wh kg-1 at the power density of 99.86 W kg-1 and Na-ion capacitor obtains 170.96 Wh kg-1 at 133.79 W kg-1. In addition, the hybrid supercapacitors demonstrate excellent cycling performance which maintain 97 % capacitance retention for Li-ion capacitor and 85 % for Na-ion capacitor after 10,000 cycles.