Template-assisted synthesis of multi-shelled carbon hollow spheres with an ultralarge pore volume as anode materials in Li-ion batteries
Template-assisted synthesis of multi-shelled carbon hollow spheres with an ultralarge pore volume as anode materials in Li-ion batteries
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DOI：
10.1039/c4ra10591e
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发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Zhuang Sun;Xuefeng Song;Peng Zhang;Lian Gao
中科院分区：
文献类型：
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作者：
Zhuang Sun;Xuefeng Song;Peng Zhang;Lian Gao
以单壳二氧化硅空心球和双壳二氧化硅空心球为渗透模板，制备了双壳和四壳碳空心球。对于这一有趣的体系结构，超大的孔体积(3.02cm3g−1)和超高的Brunauer-Emmett-Teller比表面积(∼1534m2 g−1)赋予了多壳碳中空结构高可逆容量(∼978 mA h g−1)。值得注意的是，经过75次循环后，在低电流密度和高电流密度下仍可获得753 mA h g−1的高容量。这种透气结构使多壳中空结构成为锂离子电池的优良负极材料。
By reinventing single-shelled silica hollow spheres and double-shelled silica hollow spheres as the permeable templates, double and quadruple shell carbon hollow spheres are prepared. For this intriguing architecture, the ultralarge pore volume (3.02 cm3 g−1) and the ultrahigh Brunauer–Emmett–Teller (BET) specific surface areas (∼1534 m2 g−1) endow the multi-shelled carbon hollow structures with a high reversible capacity (∼978 mA h g−1). Remarkably, a high capacity of 753 mA h g−1 at both low and high current densities can still be attained after 75 cycles. Such a breathable structure makes the multi-shelled hollow structure a superior anode material for a Li-ion battery.