A review of recent developments in membrane separators for rechargeable lithium-ion batteries

Lee, Hun; Yanılmaz, Meltem; Toprakci, Ozan; Fu, Kun; Zhang, Xiangwu

doi:10.1039/c4ee01432d

Cited by 1,234 publications

(1,019 citation statements)

References 229 publications

(181 reference statements)

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“…However, the side effects of such a separator modification method must be taken into our consideration: it might reduce electrolyte wettability, increase electrochemical impedance and lessen active material utilization in batteries owing to the reduced pore size and increased thickness of the separator. 38,39 In this work, we aim to establish a PS shield onto the separator without jeopardizing the wettability and ionic conductivity of the membrane.…”

Section: Mpbi Functionalized Separatormentioning

confidence: 99%

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

Wang

Cai

et al. 2016

NPG Asia Mater

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The development of lithium-sulfur (Li-S) batteries is of practical significance to meet the rapidly escalating demand for advanced energy storage technologies with long life and high-energy density. However, the dissolution and shuttling of the intermediate polysulfides (PS) initiates the loss of active sulfur and the poisoning of the lithium anode, leading to unsatisfactory cyclability and consequently hinders the commercialization of Li-S batteries. Herein, we develop a facile strategy to tame the PS dissolution and the shuttling effect in the Li-S system by introducing a modified polybenzimidazole (mPBI) with multiple functions. As a binder, the excellent mechanical property of mPBI endows the sulfur electrode with strong integrity and, therefore, results in high sulfur loading (7.2 mg cm − 2 ), whereas the abundant chemical interaction between mPBI and PS affords efficient PS adsorption to inhibit sulfur loss and prolong battery life. As a functional agent for the separator, the mPBI builds a PS shield onto the separator to block PS's migration to further suppress the PS shuttling. The dual actions of mPBI confer an excellent performance of 750 mAh g − 1 (or 5.2 mAh cm − 2 ) after 500 cycles at C/5 on the Li-S battery with an ultralow capacity fading rate of 0.08% per cycle.

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Section: Mpbi Functionalized Separatormentioning

confidence: 99%

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

Wang

Cai

et al. 2016

NPG Asia Mater

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“…However, relatively little effort has so far been made to systematically study the influence of the properties of the separator, one of the indispensable components in LIBs (Arora and Zhang 2004;Ryou et al 2011), on the battery performance. The function of a separator in a LIB is generally twofold; it should prevent physical contact between the anode and cathode materials, and ensure fast ionic transport between the electrodes (Arora and Zhang 2004;Lee et al 2014;Yang and Hou 2012;Zhang 2007). In order to fulfil these two functions, the pore structure and thickness of the separator must be carefully controlled, as a good balance between ionic conductivity and mechanical strength must be maintained (Arora and Zhang 2004;Lee et al 2014;Zhang 2007).…”

Section: Introductionmentioning

confidence: 99%

Thickness difference induced pore structure variations in cellulosic separators for lithium-ion batteries

et al. 2017

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The pore structure of the separator is crucial to the performance of a lithium-battery as it affects the cell resistance. Herein, a straightforward approach to vary the pore structure of Cladophora cellulose (CC) separators is presented. It is demonstrated that the pore size and porosity of the CC separator can be increased merely by decreasing the thickness of the CC separator by using less CC in the manufacturing of the separator. As the pore size and porosity of the CC separator are increased, the mass transport through the separator is increased which decreases the electrolyte resistance in the pores of the separator. This enhances the battery performance, particularly at higher cycling rates, as is demonstrated for LiFePO 4 /Li half-cells. A specific capacity of around 100 mAh g -1 was hence obtained at a cycling rate of 2 C with a 10 lm thick CC separator while specific capacities of 40 and close to 0 mAh g -1 were obtained for separators with thicknesses of 20 and 40 lm, respectively. As the results also showed that a higher ionic conductivity was obtained for the 10 lm thick CC separator than for the 20 and 40 lm thick CC separators, it is clear that the different pore structure of the separators was an important factor affecting the battery performance in addition to the separator thickness. The present straightforward, yet efficient, strategy for altering the pore structure hence holds significant promise for the manufacturing of separators with improved performance, as well as for fundamental studies of the influence of the properties of the separator on the performance of lithium-ion cells.

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“…[45,46] In the past decades, several approaches have been developed in order to inhibit the growth of Li dendrites, such as improving the electrode materials, [47][48][49] using electrolyte additives, [50][51][52][53][54][55][56] employing solid or gel electrolytes, [57][58][59] or modifying the separator. [60][61][62][63][64][65] While these studies have made some progress, it is still not possible to completely suppress the growth of dendrites using present technologies.…”

Section: Smart Design To Avoid Internal Shortingmentioning

confidence: 99%

Smart Electrochemical Energy Storage Devices with Self‐Protection and Self‐Adaptation Abilities

Yang

Wang

et al. 2017

Advanced Materials

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Currently, with booming development and worldwide usage of rechargeable electrochemical energy storage devices, their safety issues, operation stability, service life, and user experience are garnering special attention. Smart and intelligent energy storage devices with self‐protection and self‐adaptation abilities aiming to address these challenges are being developed with great urgency. In this Progress Report, we highlight recent achievements in the field of smart energy storage systems that could early‐detect incoming internal short circuits and self‐protect against thermal runaway. Moreover, intelligent devices that are able to take actions and self‐adapt in response to external mechanical disruption or deformation, i.e., exhibiting self‐healing or shape‐memory behaviors, are discussed. Finally, insights into the future development of smart rechargeable energy storage devices are provided.

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A review of recent developments in membrane separators for rechargeable lithium-ion batteries

Abstract: The separator of a lithium-ion battery prevents the direct contact between the positive and negative electrodes while serving as the electrolyte reservoir to enable the transportation of lithium ions between the two electrodes.

Cited by 1,234 publications

References 229 publications

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

The dual actions of modified polybenzimidazole in taming the polysulfide shuttle for long-life lithium–sulfur batteries

Thickness difference induced pore structure variations in cellulosic separators for lithium-ion batteries

Smart Electrochemical Energy Storage Devices with Self‐Protection and Self‐Adaptation Abilities

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