Journal ArticleDOI
Designing of hierarchical mesoporous/macroporous silicon-based composite anode material for low-cost high-performance lithium-ion batteries
TLDR
In this paper, a mass-produced and low-cost hierarchical mesoporous/macroporous silicon-based composite material with an ample porous structure and dual carbon protective layers has been rationally designed and constructed.Abstract:
Despite the fact that the silicon-based anode has attracted immense attention with extremely high theoretical capacity, practical applications have been impeded by severe capacity fading during cycling processes and high preparation cost. In this work, a mass-produced and low-cost hierarchical mesoporous/macroporous silicon-based composite material with an ample porous structure and dual carbon protective layers has been rationally designed and constructed. Through adjusting the phase ratio of intermediate products (Mg2Si and MgO), the traditional magnesiothermic reduction method based on the low cost silicon source of diatomaceous earth (DE) has been precisely optimized to fabricate a controlled mesoporous structure on the original macroporous structure of DE. Furthermore, dual carbon protective layers on the hierarchical mesoporous/macroporous structure silicon-based composite material have also been constructed using the vacuum adsorption technique, showing that both the porous channel and the composite material surface are wrapped with carbon. Electrochemical performance tests show that both the controlled mesoporous/macroporous structure and dual carbon protective layers have enhanced the cycle stability of the Si/SiO2@C composite anode material for lithium-ion batteries. The capacity retention of the hierarchical mesoporous/macroporous Si/SiO2@C composite material with 13% carbon can reach 99.5% after 200 electrochemical cycles, and the reversible capacity can reach 534.3 mA h g−1 even at 500 mA g−1. This paper not only provides a low-cost and high electrochemical property silicon-based composite anode material for lithium-ion batteries, which possesses important significance in both academic and industrial worlds, but also opens up a way on how to design the hierarchical mesoporous/macroporous structure with precision control on the phase ratio.read more
Citations
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Journal ArticleDOI
A wide-temperature superior ionic conductive polymer electrolyte for lithium metal battery
Zhiyuan Lin,Xianwei Guo,Zichun Wang,Boya Wang,Shiman He,Luke A. O'Dell,Jun Huang,Hong Li,Haijun Yu,Liquan Chen +9 more
TL;DR: In this article, a poly(vinyl ethylene carbonate) polymer electrolyte for polymer lithium metal battery by in-situ polymerization method was designed, which provides superior ionic conductivity with 2.1 × 10−3−S cm−1 at 25°C, wide electrochemical window up to 4.5 V and excellent interfacial compatibility to electrodes.
Journal ArticleDOI
Si-based materials derived from biomass: synthesis and applications in electrochemical energy storage
TL;DR: In this article, the synthesis of Si-based materials derived from biomass and their applications in the field of electrochemical energy storage were summarized and the effect of their morphology was emphasized. And appropriate improvement schemes were proposed and prospects for the future practical applications of these materials were discussed.
Journal ArticleDOI
Silicon: toward eco-friendly reduction techniques for lithium-ion battery applications
TL;DR: In this article, the progress on current reduction approaches, including the detailed mechanism, reaction conditions, and the relationship between the diverse morphologies and electrochemical performance, are summarized, which is of great significance to the fundamental research and industrial application of Si-based anode materials.
Journal ArticleDOI
Connecting battery technologies for electric vehicles from battery materials to management
TL;DR: In this paper , the authors presented comprehensive discussions and insightful evaluations of both conventional electric vehicle (EV) batteries and the state-of-the-art battery technologies (such as all-solid-state, silicon-based, lithium-sulphur, metal-air batteries, etc.).
Journal ArticleDOI
High-Performance Porous Silicon/Nanosilver Anodes from Industrial Low-Grade Silicon for Lithium-Ion Batteries
Fengshuo Xi,Fengshuo Xi,Zhao Zhang,Xiaohan Wan,Shaoyuan Li,Shaoyuan Li,Wenhui Ma,Xiuhua Chen,Ran Chen,Bin Luo,Lianzhou Wang +10 more
TL;DR: A facile and scalable method is reported to produce multidimensional porous silicon embedded with a nanosilver particle (pSi/Ag) composite from commercially available low-cost metallurgical-grade silicon (MG-Si) powder that exhibits a large initial discharge capacity, an excellent cycling performance, and outstanding rate capacities.
References
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Journal ArticleDOI
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