Scalable synthesis of Sn nanoparticles encapsulated in hierarchical porous carbon networks for high-rate reversible lithium storage Online publication date: Mon, 07-Jan-2019
by Qingbin Zhu; Jinghao Liu; Yang Zhong; Guicun Li
International Journal of Nanomanufacturing (IJNM), Vol. 15, No. 1/2, 2019
Abstract: Sn nanoparticles encapsulated in hierarchical porous carbon networks (Sn@HPCNs) have been synthesised by the carbothermal reduction reaction of sodium stannate-crosslinked sodium polyacrylate xerogel. The synthetic strategy is simple and effective for the scalable production of Sn@HPCNs. The Sn@HPCNs show homogeneous distribution of Sn nanoparticles within hierarchical porous conductive carbon matrix. The obtained Sn@HPCNs exhibit high reversible discharge capacity (1,652.1 mAh g−1 at 0.1 A g−1), superior rate performance (499.7 mAh g−1 at 2 A g−1), and excellent cycling stability (553.0 mA h g−1 at 1.5 A g−1 after 150 cycles). The superior lithium storage performances of the Sn@HPCNs are due to uniform distribution of Sn nanoparticles within hierarchical porous conductive carbon network, which could not only provide a conductive matrix, but also buffer huge volume change caused by lithiation and thus guarantee integrity of the Sn@HPCNs structure.
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