Density modulated multilayer silicon thin films as li-ion battery anodes

2012 ◽  
Vol 1440 ◽  
Author(s):  
M. Taha Demirkan ◽  
Xin Li ◽  
Bingqing Wei ◽  
Tansel Karabacak
Keyword(s):  
Thin Films ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
High Capacity ◽  
Reversible Capacity ◽  
Low Density ◽  
Li Ion Battery ◽  
Silicon Thin Film ◽  
Battery Cell ◽  
Li Ion

AbstractIn this work, we demonstrate a new density modulated multilayered silicon thin film anode approach that can provide a robust high capacity electrode for Li-ion batteries. These films have the ability to tolerate large volume changes due to their controlled microstructure. Silicon films with alternating layers of high/low material density were deposited using a DC sputtering system. Density of the individual layers was controlled by simply changing the working gas pressure during sputtering. Samples of Si films having thicknesses of 460 nm with different number of high/low density layers have been deposited on Cu current collectors. The electrochemical performance of the multilayered anode material was evaluated using a galvanostatic battery testing system at C/10 rate. After reaching a stabilized phase the battery cell showed a high coulombic efficiency of 96% to 99% and reversible specific capacity of 666 mAh g-1 (after 100 cycles). Low-density layers are believed to be acting as compliant sheets during volume expansion making the films more durable compared to conventional Si film anodes. The results indicate that density modulated multilayer Si thin films can be used to improve the mechanical properties of Li-ion battery anodes leading to high reversible capacity values even after high number of cycles.

High electrochemical performance and phase evolution of magnetron sputtered MoO2 thin films with hierarchical structure for Li-ion battery electrodes

2014 ◽  
Vol 2 (13) ◽  
pp. 4714-4721 ◽  
Author(s):  
Yulong Liu ◽  
Hong Zhang ◽  
Pan Ouyang ◽  
Wenhao Chen ◽  
Ying Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transformation ◽  
Electrochemical Performance ◽  
Hierarchical Structure ◽  
Rate Capability ◽  
Reversible Capacity ◽  
Phase Evolution ◽  
Li Ion Battery ◽  
Transformation Mechanism ◽  
Li Ion

MoO2 thin films with hierarchical structure demonstrate excellent rate capability and reversible capacity, and the phase transformation mechanism was revealed.

Cobalt oxide thin films for high capacity and stable Li-ion battery anode

2018 ◽  
Vol 23 (2) ◽  
pp. 513-518 ◽  
Author(s):  
Anto P. Varghese ◽  
Shantikumar Nair ◽  
Dhamodaran Santhanagopalan
Keyword(s):  
Thin Films ◽  
Cobalt Oxide ◽  
High Capacity ◽  
Li Ion Battery ◽  
Oxide Thin Films ◽  
Li Ion ◽  
Battery Anode

scholarly journals A Commercial Carbonaceous Anode with a-Si Layers by Plasma Enhanced Chemical Vapor Deposition for Lithium Ion Batteries

2020 ◽  
Vol 4 (2) ◽  
pp. 72
Author(s):  
Chao-Yu Lee ◽  
Fa-Hsing Yeh ◽  
Ing-Song Yu
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Coulombic Efficiency ◽  
Low Cost ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Chemical Vapor ◽  
Li Ion Battery ◽  
Li Ion

In this study, we propose a mass production-able and low-cost method to fabricate the anodes of Li-ion battery. Carbonaceous anodes, integrated with thin amorphous silicon layers by plasma enhanced chemical vapor deposition, can improve the performance of specific capacity and coulombic efficiency for Li-ion battery. Three different thicknesses of a-Si layers (320, 640, and 960 nm), less than 0.1 wt% of anode electrode, were deposited on carbonaceous electrodes at low temperature 200 °C. Around 30 mg of a-Si by plasma enhanced chemical vapor deposition (PECVD) can improve the specific capacity ~42%, and keep coulombic efficiency of the half Li-ion cells higher than 85% after first cycle charge-discharge test. For the thirty cyclic performance and rate capability, capacitance retention can maintain above 96%. The thicker a-Si layers on carbon anodes, the better electrochemical performance of anodes with silicon-carbon composites we get. The traditional carbonaceous electrodes can be deposited a-Si layers easily by plasma enhanced chemical vapor deposition, which is a method with high potential for industrialization.

MnO2 Nanoparticles Anchored Multi Walled Carbon Nanotubes as Potential Anode Materials for Lithium Ion Batteries

2021 ◽  
Vol 21 (10) ◽  
pp. 5296-5301
Author(s):  
Ahmad Umar ◽  
Faheem Ahmed ◽  
Ahmed A. Ibrahim ◽  
Hassan Algadi ◽  
Hasan B. Albargi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Anode Materials ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Li Ion Battery ◽  
Multi Walled Carbon Nanotubes ◽  
Li Ion ◽  
Walled Carbon Nanotubes ◽  
Charge Discharge

Herein, we report a facile hydrothermal synthesis of MnO2 nanoparticles anchored multi walled carbon nanotubes (MnO2@MWCNTs) as potential anode materials for lithium-ion (Li-ion) batteries. The prepared MnO2@MWCNTs were characterized by several techniques which confirmed the formation of MnO2 nanoparticles anchored MWCNTs. The X-ray diffraction and Raman-scattering analyses of the prepared material further revealed the effective synthesis of MnO2@MWCNTs. The fabricated Li-ion battery based on MnO2@MWCNTs exhibited a reversible capacity of ~823 mAhg−1 at a current density of 100 mAg−1 for the first cycle, and delivered a capacity of ~421 mAhg−1 for the 60 cycles. The coulombic efficiency was found to be ~100% which showed excellent reversible charge–discharge behavior. The outstanding performance of the MnO2@MWCNTs anode for the Li-ion battery can be attributed to the distinctive morphology of the MnO2 nanoparticles anchored MWCNTs that facilitated the fast transport of lithium ions and electrons and accommodated a broad volume change during the cycles of charge/discharge.

High capacity and exceptional cycling stability of ternary metal sulfide nanorods as Li ion battery anodes

2015 ◽  
Vol 51 (69) ◽  
pp. 13350-13353 ◽  
Author(s):  
Dhrubajyoti Bhattacharjya ◽  
Apurba Sinhamahapatra ◽  
Jae-Jung Ko ◽  
Jong-Sung Yu
Keyword(s):  
Specific Capacity ◽  
High Capacity ◽  
Metal Sulfide ◽  
Cycling Stability ◽  
Passivation Layer ◽  
Li Ion Battery ◽  
Composite Binder ◽  
High Specific Capacity ◽  
Ternary Metal ◽  
Li Ion

Ternary spinel NiCo2S4 nanorods demonstrate high specific capacity and outstanding cycling stability as Li ion battery anodes due to restriction of a polymeric gel passivation layer by the CMC–PAA composite binder.

Enhancing Co/Co2VO4 Li-ion Battery Anode Performances via 2D-2D Heterostructure Engineering

Nanoscale ◽  
2021 ◽  
Author(s):  
Kun Wang ◽  
Yongyuan Hu ◽  
Jian Pei ◽  
Fengyang Jing ◽  
Zhongzheng Qin ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Output Voltage ◽  
High Capacity ◽  
Lithium Ion ◽  
Li Ion Battery ◽  
Li Ion ◽  
Battery Anode

High capacity Co2VO4 becomes a potential anode material for lithium ion batteries (LIBs) benefiting from its lower output voltage during cycling than other cobalt vanadates. However, the application of this...

scholarly journals Improving Cyclability of Lithium Metal Anode via Constructing Atomic Interlamellar Ion Channel for Lithium Sulfur Battery

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Mao Yang ◽  
Nan Jue ◽  
Yuanfu Chen ◽  
Yong Wang
Keyword(s):  
Ion Channel ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Absorption Capacity ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Li Ion ◽  
Sulfur Battery ◽  
Rapid Transfer

AbstractUniform migration of lithium (Li) ions between the separator and the lithium anode is critical for achieving good quality Li deposition, which is of much significance for lithium metal battery operation, especially for Li–sulfur (Li–S) batteries. Commercial separators such as polypropylene or polyethylene can be prepared by wet or dry processes, but they can indeed cause plentiful porosities, resulting in the uneven Li ion stripping/plating and finally the formation of Li dendrites. Thence, we constructed an atomic interlamellar ion channel by introducing the layered montmorillonite on the surface of the separator to guide Li ion flux and achieved stable Li deposition. The atomic interlamellar ion channel with a spacing of 1.4 nm showed strong absorption capacity for electrolytes and reserved capacity for Li ions, thus promoting rapid transfer of Li ions and resulting in even Li ion deposition at the anode. When assembled with the proposed separator, the Coulombic efficiency of Li||Cu batteries was 98.2% after 200 cycles and stable plating/stripping even after 800 h was achieved for the Li||Li symmetric batteries. Importantly, the proposed separator allows 140% specific capacity increase after 190 cycles as employing the Li–S batteries.

scholarly journals Li2(BH4)(NH2) Nanoconfined in SBA-15 as Solid-State Electrolyte for Lithium Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 946
Author(s):  
Qianyi Yang ◽  
Fuqiang Lu ◽  
Yulin Liu ◽  
Yijie Zhang ◽  
Xiujuan Wang ◽  
...  
Keyword(s):  
Solid State ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Transference Number ◽  
Electrochemical Stability ◽  
Ion Conductivity ◽  
Solid State Batteries ◽  
Li Ion ◽  
Conduction Properties

Solid electrolytes with high Li-ion conductivity and electrochemical stability are very important for developing high-performance all-solid-state batteries. In this work, Li2(BH4)(NH2) is nanoconfined in the mesoporous silica molecule sieve (SBA-15) using a melting–infiltration approach. This electrolyte exhibits excellent Li-ion conduction properties, achieving a Li-ion conductivity of 5.0 × 10−3 S cm−1 at 55 °C, an electrochemical stability window of 0 to 3.2 V and a Li-ion transference number of 0.97. In addition, this electrolyte can enable the stable cycling of Li|Li2(BH4)(NH2)@SBA-15|TiS2 cells, which exhibit a reversible specific capacity of 150 mAh g−1 with a Coulombic efficiency of 96% after 55 cycles.

Novel-shaped LiNi1/3Co1/3Mn1/3O2 prepared by a hydroxide coprecipitation method

2008 ◽  
Vol 80 (11) ◽  
pp. 2537-2542 ◽  
Author(s):  
Zexun Tang ◽  
Deshu Gao ◽  
Ping Chen ◽  
Zhaohui Li ◽  
Qiang Wu
Keyword(s):  
Specific Capacity ◽  
High Capacity ◽  
Coprecipitation Method ◽  
X Ray Diffraction ◽  
Capacity Retention ◽  
Uniform Size ◽  
Li Ion ◽  
New Generation ◽  
Optimized Conditions ◽  
Hydroxide Coprecipitation

Ni1/3Co1/3Mn1/3(OH)2, a precursor of LiNi1/3Co1/3Mn1/3O2 in new-generation Li-ion batteries, was prepared by a hydroxide coprecipitation method. Scanning electronic microscopy (SEM) micrographs reveal that the precursor particles thus obtained, show regular shape with uniform size under optimized conditions. X-ray diffraction (XRD) indicates that well-ordered layer-structured LiNi1/3Co1/3Mn1/3O2 was prepared after calcination at high temperature. The final product exhibited a spherical morphology with uniform size distribution (10 μm in diameter). At the terminal charging voltage of 4.3 and 4.5 V (vs. Li/Li+), the testing cells of LiNi1/3Co1/3Mn1/3O2 delivered a specific capacity of 161.2 and 184.1 mAh g-1, respectively. The high capacity retention of 98.0 and 96.1 % after charging to 4.3 and 4.5 V for 50 cycles, respectively, indicates that this material displays excellent cycling stability even at high cut-off voltage.

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