Efficient
electrocatalysts for Li2CO3 decomposition play
an important role in Li–CO2 batteries. In this paper,
carbon nanotubes (CNTs) decorated with RuO2 is firstly
introduced as cathode materials for Li–CO2 batteries.
The CNT@RuO2 composite can not only deliver a high specific
capacity but also a lower charge voltage. With the CNT@RuO2 cathodes, the Coulombic efficiency still remains around 100% until
the 15th cycle. The charge voltage of early 30 cycles at a current
of 50 mA·g–1 with a capacity limit of 500 mAh·g–1 can be fully lowered under 4.0 V. Particularly, the
CNT@RuO2 cathode can realize most decomposition of prefilled
Li2CO3 and show a platform at around 3.9 V.
This catalytic activity toward both in situ formed and preloaded Li2CO3 is more feasible for practical application
in complex environment.
Graphic abstract: MnO x decorated CeO 2 nanorods as cathode catalyst for rechargeable lithium-air batteries have been fabricated via an in-situ redox reaction.
Yolk–shell structured La0.9Sr0.1CoO3 perovskite microspheres with enhanced catalytic activities for oxygen reduction and evolution reactions have been prepared through a one-pot fabrication pathway.
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