Yi Jin, Liao Kaiming, Zhang Chaofeng, Zhang Tao, Li Fujun, Zhou Haoshen
†Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba 305-8568, Japan.
ACS Appl Mater Interfaces. 2015 May 27;7(20):10823-7. doi: 10.1021/acsami.5b01727. Epub 2015 May 13.
The rechargeable Li-O2 batteries with high theoretical specific energy are considered to be a promising energy storage system for electric vehicle application. Because of the prohibitive cost, limited supply, and weak durability of precious metals, the developments of novel metal-free catalysts become significant. Herein, the graphitic-carbon nitride@carbon papers have been produced by a facile in situ method and explored as cathodes for Li-O2 batteries, which manifest considerable electrocatalytic activity toward oxygen reduction reaction and oxygen evolution reaction in nonaqueous electrolytes because of their improved electronic conductivity and high nitrogen content. The assembled Li-O2 batteries using graphitic-carbon nitride@carbon papers as cathodes deliver good rate capability and cycling stability with a capacity retention of more than 100 cycles.
具有高理论比能量的可充电锂氧电池被认为是一种有前景的用于电动汽车的储能系统。由于贵金属成本高昂、供应有限且耐久性差，新型无金属催化剂的开发变得至关重要。在此，通过一种简便的原位方法制备了石墨相氮化碳@碳纸，并将其作为锂氧电池的阴极进行探索，由于其提高的电子导电性和高氮含量，在非水电解质中对氧还原反应和析氧反应表现出相当大的电催化活性。使用石墨相氮化碳@碳纸作为阴极组装的锂氧电池具有良好的倍率性能和循环稳定性，容量保持率超过100次循环。
