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.

Novel Cathode Electrode with Superior Rate Capability Using Perforated Aluminum Current Collector for Lithium-Ion Batteries

2020 ◽  
Vol 12 (10) ◽  
pp. 1465-1468
Author(s):  
Jin-Ju Bae ◽  
Ji-Woong Shin ◽  
Seong-Jae Kim ◽  
Tae-Whan Hong
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Performance Indicators ◽  
Rate Capability ◽  
Lithium Ion ◽  
Current Collector ◽  
Aluminum Foil ◽  
Cathode Electrode ◽  
The Relationship

Electrodes were fabricated using a perforated aluminum current collector and a standard aluminum foil, and the relationship between the electrochemical performance of the battery and the current collector was investigated. The perforated aluminum foil improved the contact characteristics between the cathode materials particles and the current collector. Also, electrochemical performance indicators such discharge capacity and rate characteristics were improved due to the increased adhesion of the electrode using the perforated current collector.

scholarly journals Application of Electrodeposited Aluminum Foil to the Current Collector of Positive Electrode for Lithium-ion Batteries

2013 ◽  
Vol 81 (11) ◽  
pp. 906-911 ◽  
Author(s):  
Atsushi OKAMOTO ◽  
Naotoshi NIWA ◽  
Minato EGASHIRA ◽  
Masayuki MORITA ◽  
Nobuko YOSHIMOTO
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Current Collector ◽  
Aluminum Foil ◽  
Positive Electrode

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 Mechanical Analysis and Strength Checking of Current Collector Failure in the Winding Process of Lithium-Ion Batteries

2021 ◽  
Author(s):  
Ran Tao ◽  
Zhibo Liang ◽  
Shengxin Zhu ◽  
Le Yang ◽  
Lianhua Ma ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Circumferential Strain ◽  
Strain Analysis ◽  
Lithium Ion ◽  
Current Collector ◽  
Experimental Tests ◽  
Mechanical Analysis ◽  
Safety Hazards ◽  
Current Collectors ◽  
Fracture Failure

AbstractThe current collector fracture failure of lithium-ion batteries (LIBs) occurs during its winding production process frequently, and the consequent damages are usually large, but little research has been conducted on this phenomenon. This work stems from the difficulty and obstacles in the winding process of actual production of LIBs. The fracture failure of the current collectors is easily caused by the evolution and mutation of the mechanical behavior during the winding process, resulting in safety hazards and poor efficiency. The purpose of this work is to reveal the evolution and distribution mechanism of circumferential strain of the current collectors on the fracture failure under the constraint of winding process. Experimental tests, finite element calculations and theoretical model are used to study the evolution and distribution of circumferential strain. The dynamic evolution process of circumferential strain is tested accurately, and the mechanism of fracture failure of current collectors is revealed. The criterion for current collector strength is proposed based on the results of strain analysis and SEM observation.

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