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An N‐superdoped 3D graphene network structure with an N‐doping level up to 15.8 at% for high‐performance supercapacitor is designed and synthesized, in which the graphene foam with high conductivity acts as skeleton and nested with N‐superdoped reduced graphene oxide arogels. This material shows a highly conductive interconnected 3D porous structure (3.33 S cm−1), large surface area (583 m2 g−1),...
A 3D graphene‐foam–reduced‐graphene‐oxide hybrid nested hierarchical network is synthesized to achieve high sulfur loading and content simultaneously, which solves the “double low” issues of Li–S batteries. The obtained Li–S cathodes show a high areal capacity two times larger than that of commercial lithium‐ion batteries, and a good cycling performance comparable to those at low sulfur loading.
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