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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,*
College of Pharmacy and Biological Engineering, Chengdu University, Chengdu 610106, China
Department of Chemical Engineering, Sichuan University, Chengdu 610065, China
Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610207, China
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610065, China
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;
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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MDPI and ACS Style

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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