Single-crystal and hierarchical VSe2 as an aluminum-ion battery cathode

2019 ◽  
Vol 3 (10) ◽  
pp. 2717-2724 ◽  
Author(s):  
Haiping Lei ◽  
Mingyong Wang ◽  
Jiguo Tu ◽  
Shuqiang Jiao
Keyword(s):  
Single Crystal ◽  
Specific Capacity ◽  
Discharge Specific Capacity ◽  
Aluminum Ion

A single-crystal and hierarchical VSe2 cathode exhibits the highest discharge specific capacity of about 419.1 mA h g−1.

Synthesis and Electrochemical Properties of 0.5Li2MnO3•0.5LiMn0.5Ni0.5O2

2010 ◽  
Vol 105-106 ◽  
pp. 664-667
Author(s):  
Sheng Wen Zhong ◽  
Wei Hu ◽  
Qian Zhang
Keyword(s):  
Cathode Material ◽  
Electrochemical Properties ◽  
Specific Capacity ◽  
Precipitation Method ◽  
Electrochemical Performances ◽  
Discharge Specific Capacity ◽  
Xrd Patterns ◽  
Co Precipitation ◽  
Two Stages ◽  
Calcined Temperature

The precursor of Mn0.75Ni0.25CO3 is prepared by carbonate co-precipitation method. And the cathode material 0.5Li2MnO3•0.5LiMn0.5Ni0.5O2 is synthesized with two stages calcining temperatures T1 and T2. T1 represents 400°C, 500°C, 600°C and T2 is selected at 750°C, 850°C, 950°C respectively. XRD Patterns shows that the cathode material has the integrated structures of Li2MnO3 and LiMO2, and it has better crystallization during the rise of calcined temperature at 950°C. The electrochemical performances tests indicates that the initial discharge specific capacity are greater than 220mAh/g at the current density 0.2 mA/cm2 in 2.5-4.6V at room temperature. When cathode material is calcined at 750°C, its discharge specific capacity even reach to 248mAh/g, but the cathode material has more perfect general electrochemical properties during calcined temperature at 950°C.

Synthesis and Electrochemical Performance of Silicon/Carbon Composite Anodes through Ball Milling and Spray Drying Pyrolysis Process

2018 ◽  
Vol 914 ◽  
pp. 56-63
Author(s):  
Ying Wang ◽  
Hao Wu ◽  
Fang Ming Xiao ◽  
Ren Heng Tang ◽  
Tai Sun
Keyword(s):  
Electron Microscopy ◽  
Electrochemical Performance ◽  
Ball Milling ◽  
Spray Drying ◽  
Amorphous Carbon ◽  
Specific Capacity ◽  
Constant Current ◽  
Graphite Composite ◽  
Discharge Specific Capacity ◽  
Composite Anodes

A facile method was developed to synthesize amorphous carbon coated nano-sized silicon and graphite by using glucose or pitch as organic carbon source, nano-sized silicon particles were uniformly coated onto the artificial graphite by combined ball milling and spray drying pyrolysis, and the effect of binder types, binder amounts on the precursor morphology, feed rate and spray pressure on the electrochemical performance were investigated in detail. The partial size, surface morphology and electrochemical performances of the as-synthesized powders were analyzed by particulate size description analyzer (PSDA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and constant current charge/discharge tools. It is found that, citric acid and binder are important for improving the free-aggregation of nano-sized silicon and the morphologyof combined silicon and graphite. Therefore, under the optimal experimental conditions, amorphous carbon from pitch coated nano-sized silicon and graphite composite anodes exhibits much higher electrochemical performance. It can deliver the first discharge specific capacity of 796.3mA·h/g at a current density of 100 mA/g, as well as 85% of initial coulombic efficiency. Additionally, the discharge specific capacity retains 724.9mA·h/g, and the discharge capacity retention of a half cell system is 91% after 50 cycles.

Synthesis of Bi2S3/MoS2 Nanorods and Their Enhanced Electrochemical Performance for Aluminum Ion Batteries

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
Shimeng Zhao ◽  
Jialin Li ◽  
Haixia Chen ◽  
Jianxin Zhang
Keyword(s):  
Cathode Materials ◽  
High Performance ◽  
Low Cost ◽  
Specific Capacity ◽  
Discharge Voltage ◽  
Aluminum Ion ◽  
High Charge Density ◽  
Initial Charge ◽  
New Type ◽  
The Stability

Abstract Rechargeable aluminum ion batteries (AIBs) have attracted much attention because of their high charge density, low cost, and low flammability. Transition metal sulfides are a class of cathode materials that have been extensively studied. In this report, Bi2S3 nanorods and Bi2S3/MoS2 nanorods were synthesized by the hydrothermal method as new type of cathode materials for rechargeable AIBs. The diameter of Bi2S3/MoS2 nanorods is 20–100 nm. The Bi2S3 nanorods display high initial charge and discharge capacities of 343.3 and 251 mA h/g with a current density of 1 A/g. The static cycling for the Bi2S3/MoS2 nanorods electrode at 1 A/g denotes high stability with a specific capacity of 132.9 mA h/g after 100 cycles. The charging voltage platform of Bi2S3 nanorods and Bi2S3/MoS2 nanorods is at 1.1–1.4 V, and the discharge voltage platform is at around 0.8 V. The well-defined heterojunction maintains the stability of the Bi2S3 structure during long-term cycling, which is desirable for aluminum ion batteries. This strategy reveals new insights for designing cathode materials of high-performance AIBs.

Few-layered ultra-small MoS2 nanosheet cathode for high-performance rechargeable aluminum-ion battery

2021 ◽  
Author(s):  
Qiang Zhang ◽  
Qianfeng Liu ◽  
Erdong Wang
Keyword(s):  
Structural Stability ◽  
High Performance ◽  
Specific Capacity ◽  
Aluminum Ion ◽  
Mos2 Nanosheet

The M–MoS2 demonstrates significantly enhanced kinetic performance and structural stability, presenting a initial specific capacity 459.3 mA h g−1 at 20 mA g−1 and retained 73 mA h g−1 after 150 cycles at 100 mA g−1.

Influence of the Preparation Process on the Electrochemical Properties of xLiFePO4·yLi3V2(PO4)3/C Nano-Sized Composite Cathode Materials

2016 ◽  
Vol 680 ◽  
pp. 238-243 ◽  
Author(s):  
Bing Yan ◽  
Peng Zhao Gao ◽  
Dong Yun Li ◽  
Guang Lei Tian
Keyword(s):  
Citric Acid ◽  
Electrochemical Properties ◽  
Cathode Materials ◽  
Retention Rate ◽  
Specific Capacity ◽  
Composite Cathode ◽  
Discharge Process ◽  
Discharge Specific Capacity ◽  
Calcination Temperatures ◽  
Charge Discharge

In this paper, a series of xLiFePO4·yLi3V2(PO4)3/C (x/y = 1:0, 7:1, 5:1, 3:1, 1:1, 1:3 and 0:1, ratio in mol) nano-sized composite cathode materials were successfully prepared via the solid reaction method. Influence of x/y ratio, calcination temperatures and the content of citric acid on the composition, microstructure and electrochemical properties of the materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and electrochemical measurements, et al. results showed that the xLFP·yLVP/C (x and y ≠ 0) composites were composed of olivine LiFePO4 and monoclinic Li3V2(PO4)3, both of which featured slight structural distortions as the formation of V-doped LFP/C and Fe-doped LVP/C, respectively; With the increase of calcination temperatures, the crystallinity and particles size of the 7LFP·LVP/C composites increased, when calcined at 700°C, the initial charge/discharge specific capacity of the composites reached a maximum value of 145.6 mAh/g, and the voltage drop values between charge/discharge platform possessed the minimum value(0.04 V), suggesting the minimum polarization of the composites in charge/discharge process. Content of citric acid did not affect the compositions of the composites, with the increase of the molar ratio of citric acid to V3+, the discharge specific capacities of 7LFP·LVP/C increased first and then decreased, when it equaled to 1.0:1.0, the discharge specific capacity of the relative composites was 119.18 mAh/g, with a capacity retention rate of 93.9 % after 50 cycles, owning the excellent electrochemical stability.

Study on Preparation of Si/C Anode Material by Spray Dying and Carbonization

2016 ◽  
Vol 852 ◽  
pp. 928-934 ◽  
Author(s):  
Fang Ming Xiao ◽  
Guo Ge Peng ◽  
Ying Wang ◽  
Ren Heng Tang ◽  
Zhi Ping Xiao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Current Density ◽  
Raw Materials ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Constant Current ◽  
Artificial Graphite ◽  
Discharge Specific Capacity ◽  
Constant Current Charge ◽  
Morphology Characterization

Si/C composites were prepared by spray dying and carbonization process using silica powder, artificial graphite and glucose as raw materials. The physicochemical property and electrochemical performance of composite materials were characterized by XRD, SEM, constant current charge-discharge and cyclic voltammeter (CA) test, respectively. The results show that composite anode materials have pure phase structure with particle size of 5~20μm, and its special structure that silicon and graphite particles are constructed can exhibit good electrochemical performance. The initial discharge specific capacity of Si/C composites is 1033.2mAhg-1 at a current density of 100mAg-1.While the current density is as high as 600mAg-1, the discharge specific capacity is 584.2mAhg-1, and the first cycle coulombic efficiency is 77.3% at 100mAg-1.The mechanism of capacity fading of Si/C composites is discussed by different morphology characterization after 100 cycles.

scholarly journals Li2S encapsulated by nitrogen-doped carbon for lithium sulfur batteries

2014 ◽  
Vol 2 (42) ◽  
pp. 18026-18032 ◽  
Author(s):  
Lin Chen ◽  
Yuzi Liu ◽  
Maziar Ashuri ◽  
Caihong Liu ◽  
Leon L. Shaw
Keyword(s):  
Specific Capacity ◽  
Carbon Shell ◽  
Composite Particles ◽  
Nitrogen Doped ◽  
Discharge Specific Capacity ◽  
Initial Discharge ◽  
Lithium Sulfur Batteries ◽  
Nitrogen Doped Carbon ◽  
Lithium Sulfur

The procedure for the synthesis of Li2S/C composite particles encapsulated by a nitrogen-doped carbon shell, which exhibit the highest initial discharge specific capacity ever reported in the literature.

Synthesis of Nano-Sized FePO4 Cathode Material via a Microemulsion Technique

2013 ◽  
Vol 320 ◽  
pp. 675-682
Author(s):  
Shi Ming Zhang ◽  
Jun Xi Zhang ◽  
Suo Jiong Xu ◽  
Xu Ji Yuan ◽  
Tian Tian
Keyword(s):  
Sintering Temperature ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Microemulsion System ◽  
Discharge Specific Capacity ◽  
Structure Morphology ◽  
Stability Structure ◽  
Different Temperatures ◽  
Triton X ◽  
Crystalline Growth

A novelsynthetic method is developed to prepare nano-sized FePO4powdersused as cathode materials of lithium ion batteries. The samples are preparedvia a microemulsion system in a H2O/cyclohexane/Triton x-100/n-butylalcohol, and then sinter at different temperatures (380°C，460°C，550°C，650°C)for 3h. The thermal stability，structure，morphology and particle size are investigated by means of TG/DSC, X-raydiffraction (XRD), field emission-scanning electron microscopy (FE-SEM), andthe electrochemical properties are characterized by cyclic voltammetry (CV) andgalvanostatic charge and discharge tests. Results show the grain size of FePO4particles sintered at 460°C and 380°C for 3h ranges from 10nm to 20nm, and thecrystal structure is amorphous. The initial discharge specific capacity of FePO4cathode sintered at 460°C for 3h reaches 139mAhg-1and110mAh/g,respectively, at 0.1C and 0.3C. Increasing sintering temperature leads to thesmall particles agglomeration and the crystalline growth, and the crystalstructure changes from amorphous to trigonal when the sintering temperature isup to 550°C. The discharge specific capacity also decreases with the increase ofthe sintering temperature. These results suggest that nano-sized particles andamorphous structure can significantly improve the performances of FePO4cathode.

A novel ferrocene-containing aniline copolymer: its synthesis and electrochemical performance

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 14053-14060 ◽  
Author(s):  
Chang Su ◽  
Lvlv Ji ◽  
Lihuan Xu ◽  
Xiaogang Zhu ◽  
Huihui He ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacity ◽  
Potential Range ◽  
The Novel ◽  
Discharge Specific Capacity ◽  
Initial Discharge

The novel ferrocene-contained aniline based polymers were successfully synthesized, which demonstrated an improved discharge plateau at the potential range of about 3.0–4.0 V, as with the acceptable initial discharge specific capacity.

scholarly journals Molybdenum Dichalcogenide Cathodes for Aluminum-Ion Batteries

2020 ◽  
Author(s):  
Shalini Divya ◽  
James Johnston ◽  
T Nann
Keyword(s):  
Energy Density ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Layered Materials ◽  
Discharge Voltage ◽  
Aluminum Ion ◽  
2D Layered Materials ◽  
Average Potential ◽  
A Current ◽  
Better Than

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Many successful battery electrodes are based on 2D-layered materials. Aluminum-ion batteries are studied using molybdenum dichalcogenides: MoS2, MoSe2, and MoSSe as active cathode materials. The batteries show clear discharge voltage plateaus in the ranges 1.6–1.4 V for MoS2 and MoSe2, and 0.6–0.5 V for MoSSe. MoS2 and MoSe2 have similar crystal structures; interestingly, it is found that MoSe2 performed better than MoS2. MoSSe exhibits a higher specific capacity over MoS2 and MoSe2, but the energy density is lower than MoSe2 at a current rate of 40 mA g−1. MoSe2 cells record a discharge capacity of ≈110 mAh g−1 with an average potential in the range of 2.0–1.8 V and 1.5–0.8 V during discharge. The cells are stable at 100 mA g−1 for over 200 cycles with 90% coulombic efficiency.

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