Application of gelatin as a binder for the sulfur cathode in lithium–sulfur batteries

Sun, Jing; Huang, Yaqin; Wang, Weikun; Zhang, Yu; Wang, Anbang; Yuan, Ke

doi:10.1016/j.electacta.2008.05.022

Cited by 175 publications

(148 citation statements)

References 29 publications

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“…To tackle these problems, polymer-based strategies have recently demonstrated encouraging potential with the success of a polymer binder and separators in Li-S batteries. Multifunctional polymer binders such as gum arabic, 10 gelatin 11 and PEO, 12 among others, have demonstrated great effectiveness in maintaining electrode integrity and in confining PSs within the cathodic chamber, whereas the use of a functionalized polymer separator also revealed significant PS shuttle suppression by blocking the penetration of the PS to the anode. 13,14 Polybenzimidazole (PBI) (Scheme 1), which has a high melting point, has been extensively used in high-performance protective applications such as firefighter implements, astronaut space suits and aircraft wall fabrics, among others, owing to its superior stability and retention of mechanical strength at elevated temperatures.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…One slight oxidation shoulder appears near the main oxidation peak for the battery with the Thiokol binder. According to the previous studies, the reduction peak around 2.3 V could be assigned to the transition of element sulfur to the long-chain polysulfides (Li2Sx, 4 ≤ x ≤ 8), while the reduction peak around 2.0 V be attributed to the further conversion into the short-chain polysulfides such as Li2S2 and/or Li2S [20][21][22][23]. Conversely, the main oxidation peak in the lower potential represents the conversion of Li2S and/or Li2S2 to long-chain polysulfides and the shoulder at higher potential represents the further oxidation to elemental sulfur [24].…”

Section: Resultsmentioning

confidence: 99%

Thiokol with Excellent Restriction on the Shuttle Effect in Lithium–Sulfur Batteries

et al. 2018

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Commercial application of lithium-sulfur (Li-S) batteries is still greatly hampered by several issues, especially the shuttle effect of polysulfides. In this work, we proposed a simple but effective method to restrain the shuttle of the soluble polysulfides by adopting a novel binder of Thiokol in the sulfur cathode. Compared to the battery with conventional polyvinylidene fluoride (PVDF) binder, the initial discharge capacity for the battery with the Thiokol binder were increased by 42%, that is from 578 to 819 mAh/g, while the capacity after 200 cycles were increased by 201%, which is from 166 to 501 mAh/g. Besides, according to the rate capability test cycling from 0.1 to 1 C, the battery with the Thiokol binder still released a capacity amounting to 90.9% of the initial capacity, when the current density returned back to 0.1 C. Based on the UV-vis and ex situ XRD results, it is reasonably proposed that the reactions with polysulfides of the Thiokol help to restrain the shuttle effect of polysulfides. It is therefore suggested that the novel Thiokol binder holds promise for application in high-performance lithium-sulfur batteries.

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“…The binders most commonly used in Li/S cells are polymeric materials which may be (a) ionically conducting, like PEO [11,12,33,35,[39][40][41], nafion [42], polyacrylic acid (PAA) [43], (b) electronically conducting, like polyanilines and polypyrroles [44,45], or (c) inert, like poly(tetrafluoro ethylene) (PTFE) [46][47][48], fluorinated polymers like PVdF and poly(vinylidenefluoride-co-hexafluoro propylene) (PVdF-HFP) [31,44,[49][50][51][52], polyvinylpyrrolidone (PVP) [53], gelatin [54,55], carboxymethylcellulose (CMC) and styrene-butadiene rubbers [13,56,57]. The binder has to strongly bind the positive active material and conductive agent to the current collector and enhance the mechanical integrity of the electrode.…”

Section: Binder and Conductive Agentmentioning

confidence: 99%

Lithium/Sulfur Secondary Batteries: A Review

Zhao

Cheruvally

Kim

et al. 2016

Journal of Electrochemical Science and Technology

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Lithium batteries based on elemental sulfur as the cathode-active material capture great attraction due to the high theoretical capacity, easy availability, low cost and non-toxicity of sulfur. Although lithium/sulfur (Li/S) primary cells were known much earlier, the interest in developing Li/S secondary batteries that can deliver high energy and high power was actively pursued since early 1990's. A lot of technical challenges including the low conductivity of sulfur, dissolution of sulfurreduction products in the electrolyte leading to their migration away from the cathode, and deposition of solid reaction products on cathode matrix had to be tackled to realize a high and stable performance from rechargeable Li/S cells. This article presents briefly an overview of the studies pertaining to the different aspects of Li/S batteries including those that deal with the sulfur electrode, electrolytes, lithium anode and configuration of the batteries.

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Application of gelatin as a binder for the sulfur cathode in lithium–sulfur batteries

Cited by 175 publications

References 29 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

Thiokol with Excellent Restriction on the Shuttle Effect in Lithium–Sulfur Batteries

Lithium/Sulfur Secondary Batteries: A Review

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