Polytriphenylamine used as an electroactive separator material for overcharge protection of rechargeable lithium battery

Feng, Jinkui; Ai, Xinping; Cao, Yong; Yang, Hanxi

doi:10.1016/j.jpowsour.2006.03.040

Cited by 40 publications

(18 citation statements)

References 22 publications

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“…140,141 Solutions of these polymers are used to impregnate standard commercial separators and then dried. Bilayer separators have also been used where different electroactive polymers are used for contact with either cathode or anode (see Figure 37).…”

Section: Electroactive Separators For Overcharge Protectionmentioning

confidence: 99%

Vehicle Battery Safety Roadmap Guidance

Doughty¹

2012

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Printed on paper containing at least 50% wastepaper, including 10% post consumer waste. ForewordIn 2010, the National Renewable Energy Laboratory (NREL) entered into a subcontract agreement with Dr. Daniel Doughty, the principal of Battery Safety Consulting Inc. At NREL, we perform battery research and development (R&D) in areas of materials, modeling, testing, and system analysis, particularly as they relate to the lithium-ion (Li-ion) battery safety modeling and testing for electrified vehicles. This work was supported by the U.S. Department of Energy's (DOE) Energy Storage R&D Vehicle Technologies Program in the Office of Energy Efficiency and Renewable Energy under DOE/VTP Agreement 16378 of the 1102000 B&R, NREL Task Number FC086200.The purpose of the subcontract was to investigate the research, development, and other activities related to the safety of Li-ion batteries for electric drive vehicles and to provide recommendations for developing a DOE roadmap for the safety of Li-ion batteries for electric drive vehicles. Dr. Doughty has a long, distinguished career in battery R&D, particularly at Sandia National Laboratories (SNL), where he was responsible for the safety and abuse tolerance testing of batteries for more than 15 years. Dr. Doughty has chaired the Society of Automotive Engineers (SAE) committee that revised and updated SAE Recommended Test Procedure J2464, "Electric and Hybrid Electric Vehicle Rechargeable Energy Storage System (RESS) Safety and Abuse Testing," published November 2009. With his strong experience in battery safety and involvement with safety committees, Dr. Doughty was in a unique position to perform this work by collecting the necessary information, interacting with key players in the community, and providing recommendations.This document is divided into two sections: (1) the synopsis, which discusses high-level findings of the work, and (2) the full report, which provides a comprehensive, in-depth review of the state of the art and also discusses interactions with experts, users, researchers, and developers from different organizations interested in the safety of vehicle batteries.The findings and recommendations in this document will be taken into consideration by the Energy Storage R&D Program at the DOE Vehicle Technologies Program for further defining the R&D roadmap for developing safer batteries for electric drive vehicles. SynopsisThe safety of electrified vehicles with high-capacity energy storage devices creates challenges that must be met to ensure commercial acceptance of electric vehicles (EVs) and hybrid electric vehicles (HEVs). One of the most important objectives of DOE's Office of Vehicle Technologies is to support the development of Li-ion batteries that are safe and abuse tolerant in electric drive vehicles.Batteries for EVs and HEVs, which in this document includes plug-in hybrid electric vehicles (PHEVs), are different from batteries developed for other applications. The environment that vehicle traction batteries experience during their life is more diff...

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Section: Electroactive Separators For Overcharge Protectionmentioning

confidence: 99%

Vehicle Battery Safety Roadmap Guidance

Doughty¹

2012

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“…Separator is the important component of the LIBs that separates the cathodes and anodes to avoid short‐circuit [1–6] . The composition and structure of separators greatly influence the internal resistance and safety performance of LIBs [7–13] . They are drawing increasing attentions as many researches about separators have been done to meet the safety requirements of the LIBs [14–19] .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al₂O₃‐Coated Non‐Woven Separator

Meng

Gao

Zhang

et al. 2020

Batteries & Supercaps

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Thermal runaway (TR) is the fatal safety defects that hinder the wide application of automotive batteries. The short circuit caused by shrinkage of separators under high temperatures leads to TR. In this paper, we demonstrate the robust thermal stability of an Al2O3 coated non‐woven polyethylene terephthalate (PET) separator. The shrinkage ratio of the Al2O3 coated separator has been compared with the non‐coated polyethylene (PE) separator by differential scanning calorimetry (DSC), thermogravimetry (TG ) and heat nail tests. Automotive lithium‐ion batteries (LIBs) with large capacities have been used to conduct the simulations of nail penetration. TR is found to be triggered by Joule heat generation during the shrinkage of the separators. The separator with lower shrinkage retains highly stable dimension against wide range temperature changes. This feature enables the Al2O3 coated separator to prevent inner short circuits. The improved safety performance indicates a promising prospect of Al2O3 coated non‐woven separators in LIBs.

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“…Our previous studies demonstrated that the use of potential‐sensitive separator seems to be an effective mean to clamp the charge voltage at a given height, because this type of separator can provide not only reversible overcharge protection, but also sufficiently high shunting current for the overcharged cells . This separator can be prepared simply by incorporating a conductive polymer with a required redox potential into the pores of microporous film.…”

Section: Introductionmentioning

confidence: 99%

A redox‐active polythiophene‐modified separator for safety control of lithium‐ion batteries

Zhang

Cao

et al. 2013

J Polym Sci B Polym Phys

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A potential‐sensitive separator is prepared simply by incorporating a redox‐active poly(3‐butylthiophene) (P3BT) into the micropores of a commercial porous polyolefin film and tested for overcharge protection of LiFePO4/Li4Ti5O12 lithium‐ion batteries. The experimental results demonstrate that owing to the reversible p‐doping and dedoping of the redox‐active P3BT polymer embedded in the separator with the changes of the cathode potential from an overcharge state to a normal operating state, this type of separator can reversibly switch between electronically insulating state and conductive state to maintain the charge voltage of LiFePO4/Li4Ti5O12 cells at a safety value of ≤2.4 V, and thus protecting the cell from voltage runaway. As this type of the separators works reversibly and has no negative impact on the battery performances, it can be used as an internal and self‐protecting mechanism for commercial lithium‐ion batteries and other rechargeable batteries. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 1487–1493

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Polytriphenylamine used as an electroactive separator material for overcharge protection of rechargeable lithium battery

Cited by 40 publications

References 22 publications

Vehicle Battery Safety Roadmap Guidance

Vehicle Battery Safety Roadmap Guidance

Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al₂O₃‐Coated Non‐Woven Separator

A redox‐active polythiophene‐modified separator for safety control of lithium‐ion batteries

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Polytriphenylamine used as an electroactive separator material for overcharge protection of rechargeable lithium battery

Cited by 40 publications

References 22 publications

Vehicle Battery Safety Roadmap Guidance

Vehicle Battery Safety Roadmap Guidance

Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al2O3‐Coated Non‐Woven Separator

A redox‐active polythiophene‐modified separator for safety control of lithium‐ion batteries

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Product

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Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al₂O₃‐Coated Non‐Woven Separator