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Journal ArticleDOI: 10.1039/D0TA08913C

The rational design of a redox-active mixed ion/electron conductor as a multi-functional binder for lithium-ion batteries

02 Mar 2021-Journal of Materials Chemistry (Royal Society of Chemistry (RSC))-Vol. 9, Iss: 8, pp 4751-4757
Abstract: A redox-active mixed ion and electron conductor (redox-active MIEC) is presented as a binder for the lithium titanate anodes of lithium-ion batteries. The redox-active MIEC binder (symbolized by PT*-GmCn) was designed to be (1) electrically conductive along its conjugated thiophene backbone (PT = polythiophene), (2) redox-active from its succinimide moiety (* = redox-active) and (3) ionically conductive by adopting glyme (G) branches. It was superior to the practically used PVdF binder in terms of lithium ion diffusivity and electrical conductivity (1.4× and 15 000×, respectively). High capacity was guaranteed, particularly at high rates due to its MIEC nature of PT*-GmCn, while an additional capacity was achieved from its redox activity.

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Topics: Lithium titanate (56%), Lithium (55%)

7 results found

Open access
Hui Zhao1, Zhihui Wang1, Peng Lu2, Meng Jiang  +5 moreInstitutions (2)
29 Apr 2015-
Abstract: Silicon alloys have the highest specific capacity when used as anode material for lithium-ion batteries; however, the drastic volume change inherent in their use causes formidable challenges toward achieving stable cycling performance. Large quantities of binders and conductive additives are typically necessary to maintain good cell performance. In this report, only 2% (by weight) functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for ∼500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from ∼48% to ∼90%. The combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell.

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Topics: Lithium-ion battery (64%)

118 Citations

Open accessJournal Article
Abstract: An environmentally benign, highly conductive, and mechanically strong binder system can overcome the dilemma of low conductivity and insufficient mechanical stability of the electrodes to achieve high performance lithium ion batteries (LIBs) at a low cost and in a sustainable way. In this work, the naturally occurring binder sodium alginate (SA) is functionalized with 3,4-propylenedioxythiophene-2,5-dicarboxylic acid (ProDOT) via a one-step esterification reaction in a cyclohexane/dodecyl benzenesulfonic acid (DBSA)/water microemulsion system, resulting in a multifunctional polymer binder, that is, SA-PProDOT. With the synergetic effects of the functional groups (e.g., carboxyl, hydroxyl, and ester groups), the resultant SA-PProDOT polymer not only maintains the outstanding binding capabilities of sodium alginate but also enhances the mechanical integrity and lithium ion diffusion coefficient in the LiFePO4 (LFP) electrode during the operation of the batteries. Because of the conjugated network of the PProDOT and the lithium doping under the battery environment, the SA-PProDOT becomes conductive and matches the conductivity needed for LiFePO4 LIBs. Without the need of conductive additives such as carbon black, the resultant batteries have achieved the theoretical specific capacity of LiFePO4 cathode (ca. 170 mAh/g) at C/10 and ca. 120 mAh/g at 1C for more than 400 cycles.

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Topics: Lithium (55%), Battery (electricity) (50%)

63 Citations

Journal ArticleDOI: 10.1039/D0NJ02699A
Lijuan Liu1, Yu Ma1, Weiting Yang1, Chen Chen  +3 moreInstitutions (1)
Abstract: One of the challenges to sustainability is to efficiently and conveniently remove organic dyes from wastewater. Herein, a light ZIF-8@chitosan (CS) composite sponge with bulk density of 0.18 g cm−3 was prepared by an in situ method. The composite sponge possesses a three-dimensional porous structure with abundant chelating sites, which can efficiently and selectively remove congo red (CR). The maximum adsorption capacity (987.01 mg g−1) is higher than most chitosan-based adsorbents. High selective adsorption towards CR over other dyes is also demonstrated. Over 90% adsorption capacity was retained after five adsorption–desorption cycles. In addition, a column-mounted equipment for fixed-bed cycle wastewater treatment was assembled with a freestanding ZIF-8@CS sponge, which exhibited high CR removal efficiency of 99%. Based on the systematic spectroscopy characterization, the dominant role in the superior adsorption performance is attributed to the electrostatic interactions, hydrogen bonds, π–π stacking and metal coordinating interaction between the ZIF-8@CS sponge and CR.

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Topics: Selective adsorption (55%), Adsorption (54%), Congo red (51%)

2 Citations

Journal ArticleDOI: 10.1016/J.RSER.2021.111227
Abstract: The demand for safer and cost-effective lithium-ion batteries with higher energy density and longer life requires thorough investigation into the structural and electrochemical behavior of cell components. Binders are a key component in an electrochemical cell that function to interconnect the active material and conductive additive and adhere firmly to the current collector. The characteristic changes in binders during device operation can result in desquamation of active materials from the current collector and induce capacity degradation. Here we provide a comprehensive evaluation of the pros and cons of the traditional polyvinylidene fluoride (PVDF) binder, the correlation between PVDF and capacity loss, and the research progress of aqueous-based binders. Although aqueous-based slurry technology has spurred widespread interest across myriad topics, the purpose of this study is to examine whether aqueous binders can facilitate breakthroughs in future battery technology from the commercialization perspective. By critically analyzing the electrochemical performance of commercially viable anodes and cathodes, we address the key advantages as well as disadvantages of aqueous-based binders. Although aqueous binders outperform the low expandable graphite anode and metal oxide cathodes, their efficiency for largely expandable silicon anodes is unsatisfactory. Thus, aggressive effort is required to develop high-performance binders for future battery technology.

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Topics: Battery (electricity) (50%)

1 Citations

Journal ArticleDOI: 10.1007/S42835-021-00936-W
Liu Mengru1, Ye Chengxi1, Peng Libo1, Weng Jingzheng1Institutions (1)
Abstract: As an integral component of electrodes, binder is one of the key factors for improving of the performance and prolonging the service life of lithium batteries. To predict the service life of lithium batteries, observing the impedance evolution of batteries during the cycling process has been considered as a promising strategy. Electrochemical impedance spectroscopy as an effective measurement has been applied in numerous studies to explore the impedance behavior of lithium batteries. Therefore, this paper reviews the influencing factors of the impedance variation during charging and discharging processes and the influence of various binders on the impedance performance of lithium-ion batteries. Moreover, an outlook is proposed for the modification of binders to improve the performance of lithium-ion batteries.

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Topics: Lithium (51%)


41 results found

Journal ArticleDOI: 10.1038/35104644
Jean-Marie Tarascon1, Michel Armand2Institutions (2)
15 Nov 2001-Nature
Abstract: Technological improvements in rechargeable solid-state batteries are being driven by an ever-increasing demand for portable electronic devices. Lithium-ion batteries are the systems of choice, offering high energy density, flexible and lightweight design, and longer lifespan than comparable battery technologies. We present a brief historical review of the development of lithium-based rechargeable batteries, highlight ongoing research strategies, and discuss the challenges that remain regarding the synthesis, characterization, electrochemical performance and safety of these systems.

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15,475 Citations

Journal ArticleDOI: 10.1038/451652A
Michel Armand1, Jean-Marie Tarascon1Institutions (1)
06 Feb 2008-Nature
Abstract: Researchers must find a sustainable way of providing the power our modern lifestyles demand.

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13,749 Citations

Journal ArticleDOI: 10.1126/SCIENCE.1212741
18 Nov 2011-Science
Abstract: The increasing interest in energy storage for the grid can be attributed to multiple factors, including the capital costs of managing peak demands, the investments needed for grid reliability, and the integration of renewable energy sources. Although existing energy storage is dominated by pumped hydroelectric, there is the recognition that battery systems can offer a number of high-value opportunities, provided that lower costs can be obtained. The battery systems reviewed here include sodium-sulfur batteries that are commercially available for grid applications, redox-flow batteries that offer low cost, and lithium-ion batteries whose development for commercial electronics and electric vehicles is being applied to grid storage.

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Topics: Grid energy storage (67%), Intermittent energy source (65%), Energy storage (63%) ... show more

8,906 Citations

Journal ArticleDOI: 10.1021/JA3091438
John B. Goodenough1, Kyusung Park1Institutions (1)
Abstract: Each cell of a battery stores electrical energy as chemical energy in two electrodes, a reductant (anode) and an oxidant (cathode), separated by an electrolyte that transfers the ionic component of the chemical reaction inside the cell and forces the electronic component outside the battery. The output on discharge is an external electronic current I at a voltage V for a time Δt. The chemical reaction of a rechargeable battery must be reversible on the application of a charging I and V. Critical parameters of a rechargeable battery are safety, density of energy that can be stored at a specific power input and retrieved at a specific power output, cycle and shelf life, storage efficiency, and cost of fabrication. Conventional ambient-temperature rechargeable batteries have solid electrodes and a liquid electrolyte. The positive electrode (cathode) consists of a host framework into which the mobile (working) cation is inserted reversibly over a finite solid–solution range. The solid–solution range, which is...

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Topics: Battery (electricity) (66%), Anode (56%), Chemical energy (54%) ... show more

5,431 Citations

Journal ArticleDOI: 10.1039/C1EE01598B
Vinodkumar Etacheri1, Rotem Marom1, Ran Elazari1, Gregory Salitra1  +1 moreInstitutions (1)
Abstract: Li-ion battery technology has become very important in recent years as these batteries show great promise as power sources that can lead us to the electric vehicle (EV) revolution. The development of new materials for Li-ion batteries is the focus of research in prominent groups in the field of materials science throughout the world. Li-ion batteries can be considered to be the most impressive success story of modern electrochemistry in the last two decades. They power most of today's portable devices, and seem to overcome the psychological barriers against the use of such high energy density devices on a larger scale for more demanding applications, such as EV. Since this field is advancing rapidly and attracting an increasing number of researchers, it is important to provide current and timely updates of this constantly changing technology. In this review, we describe the key aspects of Li-ion batteries: the basic science behind their operation, the most relevant components, anodes, cathodes, electrolyte solutions, as well as important future directions for R&D of advanced Li-ion batteries for demanding use, such as EV and load-leveling applications.

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Topics: Battery (electricity) (50%)

4,656 Citations

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