scholarly journals High Electrochemical Performance Silicon Thin-Film Free-Standing Electrodes Based on Buckypaper for Flexible Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2053
Author(s):  
Oyunbayar Nyamaa ◽  
Duck-Hyeon Seo ◽  
Jun-Seok Lee ◽  
Hyo-Min Jeong ◽  
Sun-Chul Huh ◽  
...  
Keyword(s):  
Thin Film ◽  
Electrical Conductivity ◽  
Electrochemical Performance ◽  
Electrode Materials ◽  
Electronic Devices ◽  
High Capacity ◽  
Lithium Ion ◽  
Free Standing ◽  
Power Sources ◽  
Current Collectors

Recently, applications for lithium-ion batteries (LIBs) have expanded to include electric vehicles and electric energy storage systems, extending beyond power sources for portable electronic devices. The power sources of these flexible electronic devices require the creation of thin, light, and flexible power supply devices such as flexile electrolytes/insulators, electrode materials, current collectors, and batteries that play an important role in packaging. Demand will require the progress of modern electrode materials with high capacity, rate capability, cycle stability, electrical conductivity, and mechanical flexibility for the time to come. The integration of high electrical conductivity and flexible buckypaper (oxidized Multi-walled carbon nanotubes (MWCNTs) film) and high theoretical capacity silicon materials are effective for obtaining superior high-energy-density and flexible electrode materials. Therefore, this study focuses on improving the high-capacity, capability-cycling stability of the thin-film Si buckypaper free-standing electrodes for lightweight and flexible energy-supply devices. First, buckypaper (oxidized MWCNTs) was prepared by assembling a free stand-alone electrode, and electrical conductivity tests confirmed that the buckypaper has sufficient electrical conductivity (10−4(S m−1) in LIBs) to operate simultaneously with a current collector. Subsequently, silicon was deposited on the buckypaper via magnetron sputtering. Next, the thin-film Si buckypaper freestanding electrodes were heat-treated at 600 °C in a vacuum, which improved their electrochemical performance significantly. Electrochemical results demonstrated that the electrode capacity can be increased by 27/26 and 95/93 μAh in unheated and heated buckypaper current collectors, respectively. The measured discharge/charge capacities of the USi_HBP electrode were 108/106 μAh after 100 cycles, corresponding to a Coulombic efficiency of 98.1%, whereas the HSi_HBP electrode indicated a discharge/charge capacity of 193/192 μAh at the 100th cycle, corresponding to a capacity retention of 99.5%. In particular, the HSi_HBP electrode can decrease the capacity by less than 1.5% compared with the value of the first cycle after 100 cycles, demonstrating excellent electrochemical stability.

Al-doped VO2(B) nanobelts as cathode material with enhanced electrochemical properties for lithium-ion batteries

2018 ◽  
Vol 11 (04) ◽  
pp. 1850068 ◽  
Author(s):  
Changlei Niu
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Valence State ◽  
Electrode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Free Standing ◽  
Lattice Volume

Aluminium has shown its superiority in stabilization of the monoclinic VO2(B) in free-standing nanobelts. In this paper, aluminium-doped VO2(B) nanobelts are successfully fabricated by a facile one-step hydrothermal method and used as cathode for lithium-ion battery. XPS results show that Al-doping promotes the formation of high valence state of vanadium in VO2(B) nanobelts. Due to the accommodation of valence state of vanadium and lattice volume, Al-doped VO2(B) nanobelts used as the cathode material for lithium-ion batteries exhibit better lithium storage properties with high capacity of 172[Formula: see text]mAh[Formula: see text]g[Formula: see text] and cycling stability than undoped VO2(B) nanobelts. This work demonstrates that the doping of aluminium can significantly enhance the electrochemical performance of VO2(B), suggesting that appropriate cationic doping is an efficient path to improve the electrochemical performance of electrode materials.

Engineering flexible carbon nanofibers concatenated MOFs-derived hollow octahedral CoFe2O4 as anode materials for enhanced lithium storage

2021 ◽  
Author(s):  
Fangfang Xue ◽  
Yangyang Li ◽  
Chen Liu ◽  
Zhigang Zhang ◽  
Jun Lin ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Anode Materials ◽  
Electrode Materials ◽  
Electronic Devices ◽  
High Capacity ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Excellent Mechanical Property ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Constructing suitable electrode materials with high capacity and excellent mechanical property is indispensable for flexible lithium-ion batteries (LIBs) to satisfy the growing flexible and wearable electronic devices. Herein, a necklace-like...

Recent Advances of 2D Nanomaterials in the Electrode Materials of Lithium-Ion Batteries

NANO ◽  
2019 ◽  
Vol 14 (02) ◽  
pp. 1930001 ◽  
Author(s):  
Xiaobei Zang ◽  
Teng Wang ◽  
Zhiyuan Han ◽  
Lingtong Li ◽  
Xin Wu
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Electronic Devices ◽  
High Capacity ◽  
Lithium Ion ◽  
Energy Crisis ◽  
Two Dimensional ◽  
Long Cycle Life ◽  
Recent Advances ◽  
2D Nanomaterials

The upcoming energy crisis and the increasing power requirements of electronic devices have drawn enormous attention to research in the field of energy storage. Owing to compelling electrochemical and mechanical properties, two-dimensional nanomaterials can be used as electrodes on lithium-ion batteries to obtain high capacity and long cycle life. This review summarized the recent advances in the application of 2D nanomaterials on the electrode materials of lithium-ion batteries.

Electrophoretic Fabrication of Rechargeable Micro Lithium-Ion Battery with 3D Configuration

2012 ◽  
Vol 507 ◽  
pp. 163-167
Author(s):  
Hirokazu Munakata ◽  
Hiroya Kaido ◽  
Kazuomi Yoshima ◽  
Kiyoshi Kanamura
Keyword(s):  
Electrode Materials ◽  
Vinylidene Fluoride ◽  
High Capacity ◽  
Lithium Ion ◽  
Composite Cathode ◽  
Composite Anode ◽  
Si Substrate ◽  
Current Collectors ◽  
Poly Vinylidene Fluoride ◽  
Polymer Wall

A polymer wall was developed between interdigitated comb-type current collectors on a SiO2/Si substrate as the support for three-dimensionally (3D) accurate deposition of electrode materials by electrophoretic deposition (EPD) method. As anode and cathode materials, Li4Ti5O12 and LiCoO2 with a particle size of ~ 200 nm were synthesized, respectively, and their dispersibility in the suspensions including Ketjen Black and poly (vinylidene fluoride) was investigated. Consequently, N-methylpyrrolidone provided their good suspensions, and an electrode aspect ratio of 1:1, which can provide a high capacity and good rate performance to micro lithium-ion batteries, was successfully achieved in both Li4Ti5O12 composite anode and LiCoO2 composite cathode.

Germanium–single-wall carbon nanotube anodes for lithium ion batteries

2010 ◽  
Vol 25 (8) ◽  
pp. 1441-1446 ◽  
Author(s):  
Roberta A. DiLeo ◽  
Matthew J. Ganter ◽  
Brian J. Landi ◽  
Ryne P. Raffaelle
Keyword(s):  
Carbon Nanotube ◽  
High Capacity ◽  
Lithium Ion ◽  
Free Standing ◽  
Single Wall Carbon Nanotube ◽  
Current Collectors ◽  
Single Wall Carbon ◽  
Ion Storage ◽  
Nominal Voltage ◽  
Battery Anode

High-capacity thin-film germanium was coupled with free-standing single-wall carbon nanotube (SWCNT) current collectors as a novel lithium ion battery anode. A series of Ge–SWCNT compositions were fabricated and characterized by scanning electron microscopy and Raman spectroscopy. The lithium ion storage capacities of the anodes were measured to be proportional to the Ge weight loading, with a 40 wt% Ge–SWCNT electrode measuring 800 mAh/g. Full batteries comprising a Ge–SWCNT anode in concert with a LiCoO2 cathode have demonstrated a nominal voltage of 3.35 V and anode energy densities 3× the conventional graphite-based value. The higher observed energy density for Ge–SWCNT anodes has been used to calculate the relative improvement in full battery performance when capacity matched with conventional cathodes (e.g., LiCoO2, LiNiCoAlO2, and LiFePO4). The results show a >50% increase in both specific and volumetric energy densities, with values approaching 275 Wh/kg and 700 Wh/L.

scholarly journals A Facile Synthesis of MoS2/g-C3N4 Composite as an Anode Material with Improved Lithium Storage Capacity

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1730 ◽  
Author(s):  
Ha Tran Huu ◽  
Xuan Dieu Nguyen Thi ◽  
Kim Nguyen Van ◽  
Sung Jin Kim ◽  
Vien Vo
Keyword(s):  
Electron Microscopy ◽  
Electrochemical Performance ◽  
Photoelectron Spectroscopy ◽  
Gas Flow ◽  
Electrode Materials ◽  
High Capacity ◽  
Sodium Molybdate ◽  
Lithium Ion ◽  
Lithium Storage ◽  
X Ray

The demand for well-designed nanostructured composites with enhanced electrochemical performance for lithium-ion batteries electrode materials has been emerging. In order to improve the electrochemical performance of MoS2-based anode materials, MoS2 nanosheets integrated with g-C3N4 (MoS2/g-C3N4 composite) was synthesized by a facile heating treatment from the precursors of thiourea and sodium molybdate at 550 °C under N2 gas flow. The structure and composition of MoS2/g-C3N4 were confirmed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis and elemental analysis. The lithium storage capability of the MoS2/g-C3N4 composite was evaluated, indicating high capacity and stable cycling performance at 1 C (A·g−1) with a reversible capacity of 1204 mA·h·g−1 for 200 cycles. This result is believed the role of g-C3N4 as a supporting material to accommodate the volume change and improve charge transport for nanostructured MoS2. Additionally, the contribution of the pseudocapacitive effect was also calculated to further clarify the enhancement in Li-ion storage performance of the composite.

scholarly journals Thin-film electrodes for high-capacity lithium-ion batteries: influence of phase transformations on stress

2016 ◽  
Vol 472 (2193) ◽  
pp. 20160093 ◽  
Author(s):  
Esteban Meca ◽  
Andreas Münch ◽  
Barbara Wagner
Keyword(s):  
Thin Film ◽  
Amorphous Silicon ◽  
High Capacity ◽  
Phase Field Model ◽  
Lithium Ion ◽  
Two Phase ◽  
Power Sources ◽  
Multigrid Algorithm ◽  
Comprehensive Picture ◽  
Characteristic Features

In this study, we revisit experiments by Sethuraman et al. (2010 J. Power Sources , 195 , 5062–5066. ( doi:10.1016/j.jpowsour.2010.02.013 )) on the stress evolution during the lithiation/delithiation cycle of a thin film of amorphous silicon. Based on recent work that show a two-phase process of lithiation of amorphous silicon, we formulate a phase-field model coupled to elasticity in the framework of Larché-Cahn. Using an adaptive nonlinear multigrid algorithm for the finite-volume discretization of this model, our two-dimensional numerical simulations show the formation of a sharp phase boundary between the lithiated and the amorphous silicon that continues to move as a front through the thin layer. We show that our model captures the non-monotone stress loading curve and rate dependence, as observed in recent experiments and connects characteristic features of the curve with the structure formation within the layer. We take advantage of the thin film geometry and study the corresponding one-dimensional model to establish the dependence on the material parameters and obtain a comprehensive picture of the behaviour of the system.

Entrapping electrode materials within ultrathin carbon nanotube network for flexible thin film lithium ion batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (38) ◽  
pp. 20010-20016 ◽  
Author(s):  
Yang Wu ◽  
Hengcai Wu ◽  
Shu Luo ◽  
Ke Wang ◽  
Fei Zhao ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Nanotube ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Organic Binder ◽  
Spray Painting ◽  
Current Collectors ◽  
Carbon Nanotube Network ◽  
Painting Process

Flexible thin film lithium ion batteries are fabricated by a scalable spray-painting process without organic binder and metal current collectors.

scholarly journals Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

2021 ◽  
Vol 10 (1) ◽  
pp. 210-220
Author(s):  
Fangfang Wang ◽  
Ruoyu Hong ◽  
Xuesong Lu ◽  
Huiyong Liu ◽  
Yuan Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Low Cost ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Chemical Route ◽  
High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

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