Atomic/nano-scale in-situ probing the shuttling effect of redox mediator in Na–O2 batteries

Yang, Kai; Li, Yiwei; Jia, Lan-Wei; Wang, Yan; Wang, Zijian; Ji, Yuchen; Yang, Shichun; Titirici, Maria‐Magdalena; Liu, Xinhua; Yang, Luyi; Pan, Feng

doi:10.1016/j.jechem.2020.08.025

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…To confirm the origin of suppressed polysulfide shuttling, in situ electrochemical quartz crystal microbalance (EQCM) was employed to quantitatively and simultaneously measure the mass changes on different electrodes with different binders during the electrochemical cycling. [36,37] The frequency change of the modified crystal electrodes can be converted to the mass change in the electrodes according to the equation in Experimental Section. The cyclic voltammogram (Figure S13, Supporting Information) exhibits typical cathodic peaks around 2.3 V (vs Li/Li + ), which can be assigned to the reaction of lithium ions with sulfur and the formation of polysulfides during discharging process (consistent with the CV scanning of S/C electrodes in coin-cells as shown in Figure S14, Supporting Information).…”

Section: Trapping Of Polysulfide Speciesmentioning

confidence: 99%

Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries via a Multifunctional Conductive Binder

Chen

Song

et al. 2021

Small Methods

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cycling not only cause the pulverization of cathode but also contact loss of the electronic pathway. [9] Aiming to address the abovementioned challenges, different strategies have been developed to optimize the performance of Li-S batteries, especially the structure engineering of cathode [10,11] and electrolyte design. [5] As a minor yet important component in electrodes, polymer binders have a significant effect on battery performance. [12] Through optimization of various binders, researchers have managed to immobilize the sulfur and inhibit the dissolution of polysulfides, [13][14][15][16] enhance the adhesion force to buffer the huge volume change [17] and deliver high areal sulfur mass loading with different binder systems. [18] However, multifunctional binders that address above all issues are rarely reported.Exhibiting high specific energy and low cost, lithium-sulfur batteries are considered promising candidates for the next-generation battery. However, its wide applications are limited by the insulating nature of the sulfur, dissolution of polysulfide species, and large volume change of the sulfur cathode. In this work, a conductive binder, crosslinked polyfluorene (C-PF) is synthesized and employed in Li-S batteries to enhance the overall electrochemical performance from the following three aspects: 1) possessing high electronic conductivity, C-PF facilitates lowered areal resistance for the sulfur electrode and leads to an improved rate capability; 2) owing to the cross-linked polymer structure, favorable mechanical properties of the electrode can be achieved, hence the well-preserved electrode integrity; 3) forming strong binding with various polysulfide species, C-PF manages to trap them from diffusing to the Li anode, which greatly improves the cycling stability of Li-S cells. Through designing a multifunctional binder to comprehensively enhance the Li-S cathode, this proposed approach could be broadly applied to fully harness the energy from S redox in addition to cathode material modifications.

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Section: Trapping Of Polysulfide Speciesmentioning

confidence: 99%

Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries via a Multifunctional Conductive Binder

Chen

Song

et al. 2021

Small Methods

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“…Metallic sodium/potassium (Na/K) has been considered as a promising anode material to build high-energy-density batteries in the next-generation energy storage systems because of the high theoretical specific capacities (1165 mA h g –1 for Na and 687 mA h g –1 for K), low electrochemical potential (−2.71 V for Na and −2.93 V for K vs standard hydrogen electrode), earth abundance, and low cost. − Meanwhile, a Na/K metal anode can be paired with a large variety of high-capacity cathodes to achieve high-energy-density batteries: e.g., Na/K-O 2 , − Na/K-S, − and Na/K-CO 2 batteries. These advantages make it critical to develop rechargeable sodium and potassium metal batteries (SMBs/PMBs).…”

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Rational Design of an Artificial SEI: Alloy/Solid Electrolyte Hybrid Layer for a Highly Reversible Na and K Metal Anode

Sun

et al. 2022

ACS Nano

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The practical application of a Na/K-metallic anode is intrinsically hindered by the poor cycle life and safety issues due to the unstable electrode/electrolyte interface and uncontrolled dendrite growth during cycling. Herein, we solve these issues through an in situ reaction of an oxyhalogenide (BiOCl) and Na to construct an artificial solid electrolyte interphase (SEI) layer consisting of an alloy (Na 3 Bi) and a solid electrolyte (Na 3 OCl) on the surface of the Na anode. As demonstrated by theoretical and experimental results, such an artificial SEI layer combines the synergistic properties of high ionic conductivity, electronic insulation, and interfacial stability, leading to uniform dendrite-free Na deposition beneath the hybrid SEI layer. The protected Na anode presents a low voltage polarization of 30 mV, achieving an extended cycling life of 700 h at 1 mA cm −2 in the carbonate-based electrolyte. The full cell based on the Na 3 V 2 (PO 4 ) 3 cathode and hybrid SEI-protected Na anode shows long-term stability. When this strategy is applied to a K metal anode, the protected K anode also reaches a cycling life of over 4000 h at 0.5 mA cm −2 with a low voltage polarization of 100 mV. Our work provides an important insight into the design principles of a stable artificial SEI layer for high-energy-density metal batteries.

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Bridging Multiscale Characterization Technologies and Digital Modeling to Evaluate Lithium Battery Full Lifecycle

Liu

Zhang

et al. 2022

Advanced Energy Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/aenm.202200889. realize carbon-neutral growth have been put forward by countries all over the world, e.g., China aims to cut CO 2 emissions net-zero by 2060. [1] A promising means to reduce the dependence of our societies on fossil fuels is the development of advanced energy materials. [2] Lithium-ion batteries (LIBs) show great potential as high performance energy storage devices for consumer electronics, electrified transportation, and grid-level energy storage systems because of their inherent advantages, such as high energy density, high working voltage, low self-discharge rate, and long cycle stability, over other traditional battery systems (e.g., lead-acid battery, nickel-metal hydride battery). [3] Despite impressive progress in LIB technologies since the first invention of commercial LIBs in 1992, [4] further expansion and large-scale application of LIBs are currently hindered by limited fast charging ability, relatively low energy density, safety concerns under thermal/mechanical/electrical abuse conditions, capacity decay, and cycle stability. [4,5] Government around the world has set ambitious targets to promote more practical and higher performance batteries technology, such as the American "Battery 500 project" (500 Wh kg −1 in 2021), Chinese "Made in China 2025" (400 Wh kg −1 in 2025), Japanese "RISING II" (500 Wh kg −1 in 2030). [6] Achieving higher energy density has been a priority in recent LIB research to realize longer

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Atomic/nano-scale in-situ probing the shuttling effect of redox mediator in Na–O2 batteries

Cited by 7 publications

References 24 publications

Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries via a Multifunctional Conductive Binder

Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries via a Multifunctional Conductive Binder

Rational Design of an Artificial SEI: Alloy/Solid Electrolyte Hybrid Layer for a Highly Reversible Na and K Metal Anode

Bridging Multiscale Characterization Technologies and Digital Modeling to Evaluate Lithium Battery Full Lifecycle

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