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IMAGE: (a) Theoretical output potential, specific capacity and energy density for the KO2 and other typical K-ion battery cathodes. (b) XRD pattern and TEM images of KO2-RuO2@rGO cathode composites. The XRD.
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Credit: @Science China Press
There is an urgent need for high-energy-density rechargeable batteries to further satisfy the ever-growing demand for electrical energy storage devices. Triggering the O-related anionic redox activities (e.g. typical Li/Na/K-O2 battery, and Li/Na-rich cathodes) have been regarded as the most promising capacity-boosting strategy for batteries. However, the practical realization of Li/Na/K-O2 battery, a gas-open cell architecture, is severely plagued by some gaseous O2-related intrinsic defects. For example, porous air cathode is easily clogged by hosting the solid O2 reduction products, resulting in the practical stored energy reveals far below the theoretical value. Moreover, due to the phase changes bet ....

Zhi Chang , Chan Deng , Xin Cao , Haoshen Zhou , Huijun Yang , National Basic Research Program Of China , National Natural Science Foundation Of China , National Science , National Institute Of Advanced Industrial Science , Beijing Based National Science Review , Nanjing University , National Institute , Advanced Industrial Science , Nature Catalysis , National Basic Research Program , National Natural Science Foundation , Sci Rev , ழி சாங் , ஹான் டெங் , க்ஷின் சாவ் , தேசிய அடிப்படை ஆராய்ச்சி ப்ரோக்ர்யாம் ஆஃப் சீனா , தேசிய இயற்கை அறிவியல் அடித்தளம் ஆஃப் சீனா , தேசிய அறிவியல் , பெய்ஜிங் அடிப்படையிலானது தேசிய அறிவியல் விமர்சனம் , நான்ஜிங் பல்கலைக்கழகம் , தேசிய நிறுவனம் ,