Wenchong Ding, Zhongqiang Ye, Zhifeng Huang, Hai Hu, Li Liu
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引用次数: 0
Abstract
As the cathode material of sodium-ion battery, sodium manganese oxide has attracted considerable critical attention due to its abundant resources and low cost. However, due to the disproportionation of manganese, sodium manganese oxide often suffers from significant capacity degradation and low rate performance, which hinders its practical application. Here, the electrochemical performance of Na0.44MnO2 is significantly improved by an appropriate amount of B doping. The Na0.44Mn0.95B0.05O2 shows outstanding rate capability and excellent cycle performance, which could deliver a capacity of 61.0 mAh g−1 at 60 C and a capacity retention of 84.7% for 400 cycles at 30 C. B doping could effectively improve the electronic/ionic conductivity of Na0.44MnO2, which has been demonstrated.
锰酸钠作为钠离子电池的正极材料，因其资源丰富、成本低廉而备受关注。然而，由于锰的歧化，氧化锰钠的容量退化严重，性能低下，阻碍了其实际应用。在这里，适量的B掺杂可以显著提高Na0.44MnO2的电化学性能。Na0.44Mn0.95B0.05O2具有优异的倍率性能和循环性能，在60℃下可提供61.0 mAh g−1的容量，在30℃下可循环400次，容量保持率为84.7%。B掺杂可以有效地提高Na0.44MnO2的电子/离子电导率，这一点已经得到证实。
期刊介绍：
Electrochemical energy storage devices play a transformative role in our societies. They have allowed the emergence of portable electronics devices, have triggered the resurgence of electric transportation and constitute key components in smart power grids. Batteries & Supercaps publishes international high-impact experimental and theoretical research on the fundamentals and applications of electrochemical energy storage. We support the scientific community to advance energy efficiency and sustainability.
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