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One-Dimensional Porous Silicon Nanowires with Large Surface Area for Fast Chargeâ»Discharge Lithium-Ion Batteries.
Nanomaterials (Basel) ; 8(5)2018 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-29702591
In this study, one-dimensional porous silicon nanowire (1Dâ»PSiNW) arrays were fabricated by one-step metal-assisted chemical etching (MACE) to etch phosphorus-doped silicon wafers. The as-prepared mesoporous 1Dâ»PSiNW arrays here had especially high specific surface areas of 323.47 m²·g-1 and were applied as anodes to achieve fast chargeâ»discharge performance for lithium ion batteries (LIBs). The 1Dâ»PSiNWs anodes with feature size of ~7 nm exhibited reversible specific capacity of 2061.1 mAh·g-1 after 1000 cycles at a high current density of 1.5 A·g-1. Moreover, under the ultrafast chargeâ»discharge current rate of 16.0 A·g-1, the 1Dâ»PSiNWs anodes still maintained 586.7 mAh·g-1 capacity even after 5000 cycles. This nanoporous 1Dâ»PSiNW with high surface area is a potential anode candidate for the ultrafast chargeâ»discharge in LIBs with high specific capacity and superior cycling performance.





Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Ano de publicação: 2018 Tipo de documento: Artigo País de afiliação: China