scholarly journals Internal short circuit mitigation of high-voltage lithium-ion batteries with functional current collectors

RSC Advances ◽  
2017 ◽  
Vol 7 (72) ◽  
pp. 45662-45667 ◽  
Author(s):  
Meng Wang ◽  
Yang Shi ◽  
Daniel J. Noelle ◽  
Anh V. Le ◽  
Hyojung Yoon ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Voltage ◽  
Short Circuit ◽  
Lithium Ion ◽  
Current Collector ◽  
Current Collectors ◽  
Internal Short Circuit

A functional current collector was developed to mitigate the internal short circuit in high-voltage lithium-ion batteries.

scholarly journals Investigation of Internal Short Circuits of Lithium-Ion Batteries under Mechanical Abusive Conditions

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1885 ◽  
Author(s):  
Sheng Yang ◽  
Wenwei Wang ◽  
Cheng Lin ◽  
Weixiang Shen ◽  
Yiding Li
Keyword(s):  
Lithium Ion Batteries ◽  
Short Circuit ◽  
Mechanical Damage ◽  
Lithium Ion ◽  
Critical Factor ◽  
Current Collector ◽  
Damage Process ◽  
Internal Short Circuit ◽  
Short Circuits ◽  
Simulation Results

Current studies on the mechanical abuse of lithium-ion batteries usually focus on the mechanical damage process of batteries inside a jelly roll. In contrast, this paper investigates the internal short circuits inside batteries. Experimental results of voltage and temperature responses of lithium-ion batteries showed that battery internal short circuits evolve from a soft internal short circuit to a hard internal short circuit, as battery deformation continues. We utilized an improved coupled electrochemical-electric-thermal model to further analyze the battery thermal responses under different conditions of internal short circuit. Experimental and simulation results indicated that the state of charge of Li-ion batteries is a critical factor in determining the intensities of the soft short-circuit response and hard short-circuit response, especially when the resistance of the internal short circuit decreases to a substantially low level. Simulation results further revealed that the material properties of the short circuit object have a significant impact on the thermal responses and that an appropriate increase in the adhesion strength between the aluminum current collector and the positive electrode can improve battery safety under mechanical abusive conditions.

scholarly journals Electrochemical Performance of a Lithium Ion Battery with Different Nanoporous Current Collectors

Batteries ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 21 ◽  
Author(s):  
Huajun Feng ◽  
Yuan Chen ◽  
Yihua Wang
Keyword(s):  
Lithium Ion Batteries ◽  
Positive Impact ◽  
Lithium Ion ◽  
Current Collector ◽  
Aluminum Foil ◽  
Nanoporous Structure ◽  
Current Collectors ◽  
Copper Foam ◽  
Ultrasonic Time ◽  
Battery Capacity

In this work, we use ultrasonication and chemical etching agents to assist preparation of metal current collectors with nano-scale pores on the surface. Four different current collectors (copper foil, copper foam, aluminum foil, and aluminum foam) are prepared. The preparation parameters, ultrasonic time and etching agent concentration, are investigated and optimized accordingly. The morphologies of the as-prepared current collectors are observed under a scanning electronic microscope. Soft-packed lithium ion batteries with various current collectors are fabricated and tested. The prepared lithium ion batteries show good long-term cycle stability. The nanoporous structure of the current collector has little impact on the improvement of battery capacity under slow charging/discharging rates but has a positive impact on capacity retention under fast charging/discharging rates.

An electrolyte-phobic carbon nanotube current collector for high-voltage foldable lithium-ion batteries

2020 ◽  
Vol 8 (37) ◽  
pp. 19444-19453 ◽  
Author(s):  
Ke Wen Mu ◽  
Kai Xi Liu ◽  
Zhi Yong Wang ◽  
Shahid Zanman ◽  
Yan Hong Yin ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Lithium Ion Batteries ◽  
High Voltage ◽  
Lithium Ion ◽  
Current Collector ◽  
Ion Diffusion ◽  
Interface Modification ◽  
Lithium Ion Diffusion

Surface/interface modification is developed to tune the electrolyte wettability of a carbon nanotube current collector for controlling the lithium ion diffusion and achieving high voltage foldable lithium-ion batteries.

Comparative study on substitute triggering approaches for internal short circuit in lithium-ion batteries

2020 ◽  
Vol 259 ◽  
pp. 114143 ◽  
Author(s):  
Lishuo Liu ◽  
Xuning Feng ◽  
Mingxuan Zhang ◽  
Languang Lu ◽  
Xuebing Han ◽  
...  
Keyword(s):  
Comparative Study ◽  
Lithium Ion Batteries ◽  
Short Circuit ◽  
Lithium Ion ◽  
Internal Short Circuit
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