Uniform nitrogen-doped CoSe2 yolk–shell spheres with improved electrochemical kinetics have been synthesized, which deliver excellent sodium storage performance in terms of ultra-high-rate capability and long cycling durability. Click to show full abstract
Uniform nitrogen-doped CoSe2 yolk–shell spheres with improved electrochemical kinetics have been synthesized, which deliver excellent sodium storage performance in terms of ultra-high-rate capability and long cycling durability.
               
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