Abstract
The severe volumetric expansion and poor con-ductivity of silicon when used as anode in lithium-ion bat-teries present challenges in maintaining the stability of electrochemical performance.Herein,the binding between silicon nanoparticles and carbon nanotubes(CNTs)is achieved by the utilization of sodium alginate(SA),which is then strengthened by the coordination between Ca2+and the carboxyl group(-COO-)of SA,resulting in a stable con-ductive network with ionic transport pathway.The consoli-dated binding relationship enables silicon-based anode material to possess high mechanical strength and strong deformation resistance,preventing the separation of silicon from CNTs network.Consequently,this silicon-based anode material demonstrates a discharge specific capacity of 811 mAh·g-1 after 100 cycles at a current density of 1 A·g-1,and exhibits high rate performance,with a discharge specific capacity of 1612 mAh·g-1 at 2 A·g-1.
维普
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