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Lithium-sulfur (Li-S) batteries have attracted considerable attention as one of the most promising power sources due to the higher energy density, lower cost and better environmental friendliness. However, Li-S batteries still face a challenge of unsatisfied cycle life due to the so-called “shuttle effect”. Here, a 3D light-weight and porous C3N4 nanosheets@reduced graphene oxide (PCN@rGO) network...
Nitrogen (N)-doped carbon materials (NCMs) are a promising catalyst for oxygen reduction reaction (ORR). However, the formation process of N species in NCMs has never been discussed and which type of N species created ORR active sites is still under debate, which restricts the exploitation of high performance NCMs catalysts. Herein, we firstly prepared a variety of N-doped carbon nanotubes (NCNTs-t)...
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