Journal ArticleDOI
Reversible Cycling of Crystalline Silicon Powder
Mark N. Obrovac,L. J. Krause +1 more
TLDR
In this paper, a method was described in which crystalline silicon can be used as a practical anode material for lithium-ion batteries, and a cycling method was demonstrated in which the silicon is first partially converted to amorphous silicon, in situ, during conditioning cycles.Abstract:
A method is described in which crystalline silicon can be used as a practical anode material for lithium-ion batteries. Commercial lithium-ion cells are typically charged at a constant current to a fixed voltage and then are held by the charger at constant voltage until the current decreases to a certain value (also known as constant current/constant voltage or CCCV charging). It is first shown that CCCV charging can be used to reversibly cycle crystalline silicon and limit its capacity. A cycling method is then demonstrated in which crystalline silicon is first partially converted to amorphous silicon, in situ, during conditioning cycles. After the conditioning cycles the silicon can be cycled normally, using CCCV cycling limits, with good coulombic efficiency and little overlithiation during the first cycle.read more
Citations
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Journal ArticleDOI
High-performance lithium battery anodes using silicon nanowires
Candace K. Chan,Hailin Peng,Gao Liu,Kevin McIlwrath,Xiao Feng Zhang,Robert A. Huggins,Yi Cui +6 more
TL;DR: The theoretical charge capacity for silicon nanowire battery electrodes is achieved and maintained a discharge capacity close to 75% of this maximum, with little fading during cycling.
Journal ArticleDOI
Advanced Materials for Energy Storage
TL;DR: This Review introduces several typical energy storage systems, including thermal, mechanical, electromagnetic, hydrogen, and electrochemical energy storage, and the current status of high-performance hydrogen storage materials for on-board applications and electrochemicals for lithium-ion batteries and supercapacitors.
Journal ArticleDOI
Rechargeable lithium-sulfur batteries.
Journal ArticleDOI
High-performance lithium-ion anodes using a hierarchical bottom-up approach
TL;DR: A large-scale hierarchical bottom-up assembly route for the formation of Si on the nanoscale--containing rigid and robust spheres with irregular channels for rapid access of Li ions into the particle bulk.
Journal ArticleDOI
A review of the electrochemical performance of alloy anodes for lithium-ion batteries
TL;DR: In this paper, the authors highlight the recent progress in improving and understanding the electrochemical performance of various alloy anodes, and the causes of first-cycle irreversible capacity loss are discussed.
References
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Journal ArticleDOI
Structural changes in silicon anodes during lithium insertion/extraction
Mark N. Obrovac,Leif Christensen +1 more
TL;DR: In this article, the structural changes in silicon electrochemically lithiated and delithiated at room temperature were studied by X-ray powder diffraction, and it was shown that highly lithiated amorphous silicon suddenly crystallizes at 50 mV to form a new lithium-silicon phase, identified as This phase is the fully lithiated phase for silicon at room-temperature, not as is widely believed.
Journal ArticleDOI
In Situ XRD and Electrochemical Study of the Reaction of Lithium with Amorphous Silicon
T. D. Hatchard,J. R. Dahn +1 more
TL;DR: In this article, an in situ X-ray diffraction study of the reaction of lithium with a-Si has been performed, and the results confirm that a new crystalline Li 15 Si 4 phase is formed below 30 mV as Li/Li + as first reported by Obrovac and Christensen in an article published in Electrochemical and Solid-State Letters.
Journal ArticleDOI
Electrochemically-driven solid-state amorphization in lithium-silicon alloys and implications for lithium storage
TL;DR: In this paper, the authors show that the mechanism of electrochemical alloying is electrochemically-driven solid state amorphization, a process closely analogous to the diffusive solid-state amomorphization of thin films.
Journal ArticleDOI
Enhanced Cycle Life of Si Anode for Li-Ion Batteries by Using Modified Elastomeric Binder
TL;DR: In this paper, the cycle-life of the particulate electrode of Si, either with or without carbon coating, for Li-ion battery has significantly improved by using a modified elastomeric binder containing styrene-butadiene-rubber (SBR) and sodium-carboxyl-methyl-cellulose (SCMC).
Journal ArticleDOI
On the Aggregation of Tin in SnO Composite Glasses Caused by the Reversible Reaction with Lithium
TL;DR: In this article, the reaction mechanism in Li/[SnO:(B 2 O 3 ) x :(P 2 O 5 ) y glass (0.1≤x,y≤0.5) was shown to be inversely proportional to the spectator:Sn atom ratio.
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Structural changes in silicon anodes during lithium insertion/extraction
Mark N. Obrovac,Leif Christensen +1 more