Journal ArticleDOI
Micro-sized Si-C Composite with Interconnected Nanoscale Building Blocks as High-Performance Anodes for Practical Application in Lithium-Ion Batteries
TLDR
In this paper, a Si-C nanocomposites (e.g., nanowires, nanotubes, or nanoparticles) has been used to improve the capacity and cycling stability of high-energy-density lithium-ion batteries.Abstract:
The emerging markets of electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) generate a tremendous demand for low-cost lithium-ion batteries (LIBs) with high energy and power densities and long cycling life. [ 1–4 ] The development of such LIBs requires development of low cost, high energy-density cathode and anode materials. Conventional anode materials in commercial LIBs are primarily synthetic graphite-based materials with a capacity of ∼ 370 mAh/g. [ 5 ] Improvements in anode performance, particularly in anode capacity, are essential to achieving high energy densities in LIBs for EV and PHEV applications. Silicon has been intensively pursued as the most promising anode material for high-energy-density LIBs because of its high specifi c capacity ( > 3500 mAh/g) and abundance. [ 6 ] Despite its high capacity, Si suffers from fast capacity fading caused by its large volume change ( > 300%) during lithiation/delithiation and the serious issues stemming from this volume change, e.g., unstable solid electrolyte interphase (SEI) and disintegration (cracking and crumbling) of the electrode structure. [ 7 , 8 ] The development of Si-C nanocomposites (e.g., nanowires, nanotubes, or nanoparticles) has been widely studied. [ 9–18 ] These nanocomposites proved to be an effective method of improving capacity and cycling stability, since nano-sized Si can alleviate fracture during volume changes and the contact between Si and carbon can maintain electrical contact and improve conductivity of the nanocomposites. However, practical application of nano-sized Si materials in LIBs is diffi cult. First, achieving a high tap density is important for fabrication of high-energy LIBs for EVs and PHEVs, because it offers a high volumetric energy density. Unfortunately, the tap density of nano-sized materials is generally low, which in turn holds down their volumetric capacity. [ 19 ] Furthermore, preparation of nano-sized Si either requires chemical/physical vapor deposition or involves complicated processes, leading to costly, low-yield synthesis that is diffi cult to scale up to practical levels. [ 20–22 ] To date, the abundance of Si has not been fully capitalized upon due to lackread more
Citations
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High cycling performance cathode material: interconnected LiFePO 4 /carbon nanoparticles fabricated by sol-gel method
Zhigao Yang,Shengping Wang +1 more
TL;DR: In this paper, LiFePO4 nanoparticles encapsulated in interconnected conductive carbon layers provided the electrode reactions with fast lithium ions by offering the lithium ions shortening and unobstructed pathways.
Journal ArticleDOI
Designing bifunctional catalysts for oxygen reduction/evolution reactions for high efficiency and long lifetime
TL;DR: In this article, a self-assembly of interconnected nickel-cobaltite nanocrystals on nitrogen-doped graphene via hydrothermal synthesis is reported, and the Co3+ sites, the key radicals for bifunctional oxygen reduction and evolution reactions are demonstrated with negligible degradations.
Journal ArticleDOI
The Fabrication of Porous Si with Interconnected Micro-Sized Dendrites and Tunable Morphology through the Dealloying of a Laser Remelted Al-Si Alloy.
TL;DR: The proposed hybrid method provides a straightforward way of tuning the porous structure in the dealloyed material, making it promising for high-performance Si-based composite anode materials in lithium-ion batteries.
Advanced Anode and Cathode Materials for Li-ion Batteries: Application to Printing Methodology
TL;DR: In this paper, a full cell with carbon-coated Si/C anode and high entropy fluorides (HEF) was constructed and the performance of the battery was investigated using various electrochemical methods such as galvanostatic cycling, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS).
Journal ArticleDOI
Nitrogen-doped carbon coated silicon derived from a facile strategy with enhanced performance for lithium storage
Lingxing Zeng,Renpin Liu,Heyuan Qiu,Xi Chen,Xiaoxia Huang,Peixun Xiong,Qingrong Qian,Qinghua Chen,Mingdeng Wei +8 more
TL;DR: In this paper, the core-shell Si/nitrogen-doped carbon (Si/N−C) composite was used as anode material for Li-ion batteries.
References
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Building better batteries
TL;DR: Researchers must find a sustainable way of providing the power their modern lifestyles demand to ensure the continued existence of clean energy sources.
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Nanostructured materials for advanced energy conversion and storage devices
Antonino S. Aricò,Peter G. Bruce,Bruno Scrosati,Jean-Marie Tarascon,Jean-Marie Tarascon,Walter van Schalkwijk +5 more
TL;DR: This review describes some recent developments in the discovery of nanoelectrolytes and nanoeLECTrodes for lithium batteries, fuel cells and supercapacitors and the advantages and disadvantages of the nanoscale in materials design for such devices.
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
Lithium Batteries and Cathode Materials
TL;DR: This paper will describe lithium batteries in more detail, building an overall foundation for the papers that follow which describe specific components in some depth and usually with an emphasis on the materials behavior.
Journal ArticleDOI
Battery materials for ultrafast charging and discharging
Byoungwoo Kang,Gerbrand Ceder +1 more
TL;DR: It is shown that batteries which obtain high energy density by storing charge in the bulk of a material can also achieve ultrahigh discharge rates, comparable to those of supercapacitors.