Self-Assembled Fe 3 O 4 Nanoparticle Clusters as High-Performance Anodes for Lithium Ion Batteries via Geometric Confinement
2013; American Chemical Society; Volume: 13; Issue: 9 Linguagem: Inglês
10.1021/nl401952h
ISSN1530-6992
AutoresSoo Hong Lee, Seung‐Ho Yu, Jeong Yong Lee, Aihua Jin, Jeong Yong Lee, Jeong Yong Lee, Hyungyung Jo, Kwangsoo Shin, Tae-Young Ahn, Young-Woon Kim, Heeman Choe, Yung‐Eun Sung, Taeghwan Hyeon,
Tópico(s)Advanced Battery Materials and Technologies
ResumoAlthough different kinds of metal oxide nanoparticles continue to be proposed as anode materials for lithium ion batteries (LIBs), their cycle life and power density are still not suitable for commercial applications. Metal oxide nanoparticles have a large storage capacity, but they suffer from the excessive generation of solid–electrolyte interphase (SEI) on the surface, low electrical conductivity, and mechanical degradation and pulverization resulted from severe volume expansion during cycling. Herein we present the preparation of mesoporous iron oxide nanoparticle clusters (MIONCs) by a bottom-up self-assembly approach and demonstrate that they exhibit excellent cyclic stability and rate capability derived from their three-dimensional mesoporous nanostructure. By controlling the geometric configuration, we can achieve stable interfaces between the electrolyte and active materials, resulting in SEI formation confined on the outer surface of the MIONCs.
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