Novel Low-Temperature Electrolyte for Li-Ion Battery

2011 ◽  
Vol 287-290 ◽  
pp. 1283-1289 ◽  
Author(s):  
Yong Huan Ren ◽  
Chun Wei Yang ◽  
Bo Rong Wu ◽  
Cun Zhong Zhang ◽  
Shi Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Poor Performance ◽  
Temperature Series ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Half Cell ◽  
Li Ion ◽  
Charge Discharge ◽  
Discharge Curves

In order to overcome the limitation of Li-ion batteries at low temperature, series of electrolytes are prepared. Specially，FEC is chose to work as electrolyte solvent to enhance its poor performance. Electrolytes are composed of EC, PC, EMC and FEC, while VC is added as additive. Electrolytes with different ratio are examined, then the electrolyte with the best conductivity is studied in detail. Its characters are evaluated by CV, EIS and charge/discharge tests et al. The discharge curves of LiCo1/3Ni1/3Mn1/3O2/Li show that battery with this FEC-based electrolyte at 233K could yield 51% of room temperature capacity. Most obviously, MCMB/Li half cell with this electrolyte could fill 91% of its normal capacity at 233K while batteries barely charge any with traditional electrolyte（LiPF6/EC+DMC(1:1 in volume)）. This nice charge behavior won’t emerge unless the conductivity could basically meet the demand at 233K. The property of FEC-based electrolyte outweighs commercialized electrolyte as this article confirms.

Low-Temperature Performance of the Li[Li0.2Co0.4Mn0.4]O2 Cathode Material Studied for Li-Ion Batteries

2011 ◽  
Vol 347-353 ◽  
pp. 3662-3665 ◽  
Author(s):  
Yu Hui Wang ◽  
Zhe Li ◽  
Kai Zhu ◽  
Gang Li ◽  
Ying Jin Wei ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cathode Material ◽  
Room Temperature ◽  
Sol Gel ◽  
Cycle Performance ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Capacity Retention ◽  
X Ray ◽  
Li Ion

The Li[Li0.2Co0.4Mn0.4]O2 cathode material was prepared by a sol-gel method. Combinative X-ray diffraction (XRD) studies showed that the material was a solid solution of LiCoO2 and Li2MnO3. The material showed a reversible discharge capacity of 155.0 mAhg−1 at -20 °C, which is smaller than that at room temperature (245.5 mAhg−1). However, the sample exhibited capacity retention of 96.3 % at -20 °C, only 74.2 % at 25 °C. The good electrochemical cycle performance at low temperature was due to the inexistence of Mn3+ in the material.

Numerical Investigation of Thermal Properties for Li-Ion Battery

2020 ◽  
Author(s):  
Xiuling Wang
Keyword(s):  
Electric Vehicles ◽  
Discharge Rate ◽  
High Energy ◽  
Maximum Temperature ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Battery Design ◽  
Fast Charging ◽  
Li Ion ◽  
Charge Discharge

Abstract Li-ion battery is becoming a popular energy storage device in Hybrid Electric Vehicles (HEV) and Electric Vehicles (EV) due to its high energy density, high voltage and low self-discharge rate. The major concerns in designing Li-ion batteries are their life, performance and safety, which have close relations to their thermal behaviors. The temperature of Li-ion batteries rises during charge/discharge process. It goes faster especially with high charge/discharge rate during fast charging procedure. In this research, CFD models are developed based on ANSYS/FLUENT MSMD battery model coupled with electrochemical submodel-Newman, Tiedeman, Gu and Kim (NTGK) empirical model. Detailed simulation results are obtained in battery thermal and electrochemical behavior for different bi-cell electrode and current collector tab configurations. The temperature, potential, current density distribution at the battery length scale are determined, temperature gradient distribution is computed, and the maximum temperature at different discharge rate are also compared. The thermal investigation can provide valuable input for Li-ion battery design and analysis, especially for fast-charging batteries where heat distribution and cooling is critical for the battery design.

Improvement of the Electrochemical Properties of LiMn2O4 by Doping Rare Earth Element Ce

2011 ◽  
Vol 686 ◽  
pp. 716-719 ◽  
Author(s):  
Hai Lang Zhang ◽  
Ren Ren ◽  
Jing An
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Room Temperature ◽  
Earth Element ◽  
Spinel Phase ◽  
Specific Capacity ◽  
Li Ion Battery ◽  
Discharge Specific Capacity ◽  
Li Ion ◽  
Charge Discharge

A series of cathode materials for Li-ion battery, spinel LiMn2-xCexO4(x=0-0.03), were synthesized by the method of solid-state reaction at high temperature. The XRD data showed that all the synthesis samples were pure spinel phase. The results of charge-discharge tests show that LiMn1.98Ce0.02O4 has the highest discharge specific capacity of 119.6 mAh/g, and the discharge specific capacity of the material was 108.5 mAh/g after 50 cycles at room temperature with a retention of 91.0%, and the coulombic coefficient was still high up to 99.8%.

Estimation of Depth of Discharge of Li-ion Battery Using Neural Network

2021 ◽  
Vol 105 (1) ◽  
pp. 541-547
Author(s):  
Radoslav Cipin ◽  
Marek Toman ◽  
Petr Prochazka ◽  
Ivo Pazdera
Keyword(s):  
Neural Network ◽  
Measured Data ◽  
Feedforward Neural Network ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Counting Method ◽  
Depth Of Discharge ◽  
Li Ion ◽  
Discrete Values ◽  
Discharge Curves

This paper deals with the estimation of depth of discharge for Li-ion batteries. Estimation is based on the knowledge of discharging curves measured for discrete values of loading currents. The estimator of the depth of discharge is a form of feedforward neural network which is trained with the measured data of discharge curves. Accuracy of estimation of the depth of discharge is shown for arbitrary generated and measured loading characteristics, where the depth of discharge is estimated by the designed neural network and measured by using the Coulomb counting method.

scholarly journals Improvement of Charge-Discharge Characteristics of the Mg-Ni Powder Electrodes at 55°C

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Kuan-Jen Chen ◽  
Fei-Yi Hung ◽  
Truan-Sheng Lui ◽  
Ren-Syuan Xiao
Keyword(s):  
Anode Materials ◽  
Room Temperature ◽  
Ion Concentration ◽  
Li Ion Batteries ◽  
Sei Layer ◽  
Ni Powder ◽  
Li Ion ◽  
Discharge Capacities ◽  
Cycling Life ◽  
Charge Discharge

Magnesium-nickel (Mg-Ni) powders are used as the anode materials for secondary lithium (Li) ion batteries. Mg-Ni powders with ratios of 1 : 1 (Mg : Ni) are prepared and their structure and electrochemical behavior at room temperature and 55°C are investigated. The results show that adding Ni powders to Mg powders can reduce the charge-discharge capacities and improve cycling life. In charge-discharge cycle testing at 55°C, the Li ion concentration gradually increased with increasing the duration of electrochemical reactions, indicating that the charge-discharge capacities increase with increment of cycling number. The formation of a solid electrolyte interface (SEI) layer restrains Mg ions from dissolving into the electrolyte and thus improves the charge-discharge capacities at high temperature.

Research on metallic chalcogen-functionalized monolayer-puckered V2CX2 (X = S, Se, and Te) as promising Li-ion battery anode materials

2021 ◽  
Author(s):  
Chunmei Tang ◽  
Xiaoxu Wang ◽  
Shengli Zhang
Keyword(s):  
Surface Area ◽  
Anode Materials ◽  
Large Surface Area ◽  
Two Dimensional ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Li Ion ◽  
Battery Anode

Two-dimensional MXene nanomaterials are promising anode materials for Li-ion batteries (LIBs) due to their excellent conductivity, large surface area, and high Li capability.

Electrochemical Characteristics of Cubic ZnFe2O4 Anode for Li-Ion Batteries at Low Temperature

2016 ◽  
Author(s):  
Zhenhai Gao ◽  
Xiaoting Zhang ◽  
Hongyu Hu ◽  
Dalei Guo ◽  
Hui Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electrochemical Characteristics ◽  
Li Ion Batteries ◽  
Li Ion
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