A temperature-sensitive poly(3-octylpyrrole)/carbon composite as a conductive matrix of cathodes for building safer Li-ion batteries

Li, Hui; Wang, Feng; Zhang, Chongrong; Ji, Wei-xiao; Qian, Jiangfeng; Cao, Yuliang; Ai, Xinping

doi:10.1016/j.ensm.2018.07.007

Cited by 52 publications

(34 citation statements)

References 32 publications

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“…Recently, smart batteries with the function of thermal self-protection emerges as an attractive strategy to achieve operation safety. [11,12] Thermal self-protection requires the battery to self-lock down at high temperatures and recover to working state when the battery cools down. Thermoresponsive polymer electrolytes with the function of sol-gel transition have been proved an important approach to implement in thermal self-protection.…”

mentioning

confidence: 99%

Thermal Self‐Protection of Zinc‐Ion Batteries Enabled by Smart Hygroscopic Hydrogel Electrolytes

Yang

Feng

Liu

et al. 2020

Advanced Energy Materials

116

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With the fast development of digital society, advanced batteries with high energy density and high-power delivery, and more importantly, high safety, are in great demand for wireless communications, transportation, personal electronics, and so on. [1-3] These batteries generate considerable joule heat during fast charging/discharging, [4,5] resulting in a local high temperature environment. High operation temperature may cause permanent performance degradation of the batteries, or even lead to explosion and fire risks. [6] Therefore, thermal

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mentioning

confidence: 99%

Thermal Self‐Protection of Zinc‐Ion Batteries Enabled by Smart Hygroscopic Hydrogel Electrolytes

Yang

Feng

Liu

et al. 2020

Advanced Energy Materials

116

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“…Specifically, the R.T. conductivity of R350 was about 10 7 times larger than that of C‐Ni. Comparing with the state‐of‐the‐art conductive composites that carbon‐based PTC materials has R.T. conductivity in the range of 0.001 to 30 S cm −1 , [ 37–39 ] and silver‐based PTC materials shows a R.T. conductivity of <30 S cm −1 , [ 40 ] our TRPS films achieved the highest conductivity of about 300 S cm −1 (≈32 vol%). The conductivity curve also matched the percolation theory (Figure S4, Supporting Information), with a percolation threshold at ≈0.015 for R350 Ni, smaller than C‐Ni (≈0.02).…”

Section: Resultsmentioning

confidence: 97%

Bio‐Inspired Nanospiky Metal Particles Enable Thin, Flexible, and Thermo‐Responsive Polymer Nanocomposites for Thermal Regulation

Shi

Gao

et al. 2020

Adv Funct Materials

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Safety issues remain a major obstacle toward large‐scale applications of high‐energy lithium‐ion batteries. Embedding thermo‐responsive polymer switching materials (TRPS) into batteries is a potential strategy to prevent thermal runaway, which is a major cause of battery failures. Here, thin, flexible, highly responsive polymer nanocomposites enabled by bio‐inspired nanospiky metal (Ni) particles are reported. These unique Ni particles are synthesized by a simple aqueous reaction at gram‐scale with controlled surface morphology and composition to optimize electrical properties of the nanocomposites. The Ni particles provide TRPS films with a high room‐temperature conductivity of up to 300 S cm−1. Such TRPS composite films also have a high rate (<1 s) of resistance switching within a narrow temperature range, good reversibility upon on/off switching, and a tunable switching temperature (Ts; 75 to 170 °C) that can be achieved by tailing their compositions. The small size (≈500 nm) of Ni particles enables ready fabrication of thin and flexible TPRS films with thickness approaching 5 µm or less. These features suggest the great potential of using this new type of responsive polymer composite for more effective battery thermal regulation without sacrificing cell performance.

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“…Li et al proposed poly(3‐octylpyrrole): poly(styrenesulfonate) (P3OPy: PSS)/carbon composite (P3OPy/C) as a new positive temperature coefficient (PTC) material. [ 168 ] The resistance of cathode material LiCoO 2 mixed with P3OPy/C suddenly jumps to 1.3 × 10 4 Ω cm when the temperature rises to 100–120 °C, which is more than 4 times higher than that at ambient temperature.…”

Section: Strategies and Concepts For High‐safety Materials Designmentioning

confidence: 99%

Materials Design for High‐Safety Sodium‐Ion Battery

Yang

Xin

Mai

et al. 2020

Advanced Energy Materials

357

211

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Sodium‐ion batteries, with their evident superiority in resource abundance and cost, are emerging as promising next‐generation energy storage systems for large‐scale applications, such as smart grids and low‐speed electric vehicles. Accidents related to fires and explosions for batteries are a reminder that safety is prerequisite for energy storage systems, especially when aiming for grid‐scale use. In a typical electrochemical secondary battery, the electrical power is stored and released via processes that generate thermal energy, leading to temperature increments in the battery system, which is the main cause for battery thermal abuse. The investigation of the energy generated during the chemical/electrochemical reactions is of paramount importance for battery safety, unfortunately, it has not received the attention it deserves. In this review, the fundamentals of the heat generation, accumulation, and transportation in a battery system are summarized and recent key research on materials design to improve sodium‐ion battery safety is highlighted. Several effective materials design concepts are also discussed. This review is designed to arouse the attention of researcher and scholars and inspire further improvements in battery safety.

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A temperature-sensitive poly(3-octylpyrrole)/carbon composite as a conductive matrix of cathodes for building safer Li-ion batteries

Cited by 52 publications

References 32 publications

Thermal Self‐Protection of Zinc‐Ion Batteries Enabled by Smart Hygroscopic Hydrogel Electrolytes

Thermal Self‐Protection of Zinc‐Ion Batteries Enabled by Smart Hygroscopic Hydrogel Electrolytes

Bio‐Inspired Nanospiky Metal Particles Enable Thin, Flexible, and Thermo‐Responsive Polymer Nanocomposites for Thermal Regulation

Materials Design for High‐Safety Sodium‐Ion Battery

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