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Open AccessArticle

Bulk-Like SnO2-Fe2O3@Carbon Composite as a High-Performance Anode for Lithium Ion Batteries

by Jie Deng 1,†, Yu Dai 2,†, Zhe Xiao 3, Shuang Song 2, Hui Dai 2,4, Luming Li 1,5,* and Jing Li 2,*
1
College of Pharmacy and Biological Engineering, Chengdu University, Chengdu 610106, China
2
Department of Chemical Engineering, Sichuan University, Chengdu 610065, China
3
Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610207, China
4
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610065, China
5
Institute of Advanced Study, Chengdu University, Chengdu 610106, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2020, 10(2), 249; https://doi.org/10.3390/nano10020249
Received: 26 December 2019 / Revised: 20 January 2020 / Accepted: 27 January 2020 / Published: 30 January 2020
(This article belongs to the Special Issue Emerging Nanomaterials for Lithium-Sulfur Batteries and Beyond)
Boosted power handling and the reduced charging duration of Li ion cells critically rests with ionic/electronic mobility. Ion mobility in electrochemically relevant grains normally stands for an essential restriction of the velocity at which the energy of a cell can be stored/released. To offset sluggish solid-state ionic transport and achieve a superior power/energy density rating, electroactive grains often need exquisite nanoscaling, harming crucial virtues on volumetric packing density, tractability, sustainability, durability, and cost. Unlike elaborate nanostructuring, here we describe that a SnO2-Fe2O3@carbon composite—which adopts a metal oxide particles-intercalated bulk-like configuration—can insert many Li+ ions at elevated speeds, despite its micro-dimensionality. Analysis of charge transport kinetics in this tailor-made architecture unveils both much improved ion travel through compact monolithic substances and the greatly enhanced ion access to surfaces of SnO2/Fe2O3 grains. According to the well-studied battery degradation mechanism, it is that both the effective stress management and internal electric field in our as-prepared sample that result in recommendable capacity, rate behavior, and cyclic lifespan (exhibiting a high reversible capacity of 927 mAh g−1 at 0.2 A g−1 with a capacity retention of 95.1% after 100 cycles and an ultra-stable capacity of 429 mAh g−1 even over 1800 cycles at 3 A g−1). Unique materials and working rationale which ensure the swift (de)lithiation of such micrometer-dimensional monoliths may open a door for various high-power/density usages. View Full-Text
Keywords: lithium ion battery; tin oxide; anode; stress management; carbon; high rate handling lithium ion battery; tin oxide; anode; stress management; carbon; high rate handling
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Deng, J.; Dai, Y.; Xiao, Z.; Song, S.; Dai, H.; Li, L.; Li, J. Bulk-Like SnO2-Fe2O3@Carbon Composite as a High-Performance Anode for Lithium Ion Batteries. Nanomaterials 2020, 10, 249.

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