Silicon has gained a huge attention in the last decade,because it has a theoretical capacity (3590mAh·g-1 for Li15Si4 phase) of ～10 times higher than that of representative graphite (372mAh·g-1 for LiC6),which attribute to improve the single cell capacity heavily.However,it suffers from fast capacity fading of electrode,loss of contact with the current collector,and loss of active material contact due to continuous volume expansion and contraction of up to 400% during cycling.The mechanism of lithium storage on the issue that the latest technologies and the research progress of large volume effect during alloying/dealloying with lithium led to electrode pulverization cracking and unstable solid electrolyte interface (SEI) layer were discussed,which can provide research support for the applying of silicon cathode materials.
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基金资助
国家自然科学基金(11664023)
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