A Quasi‐Double‐Layer Solid Electrolyte with Adjustable Interphases Enabling High‐Voltage Solid‐State Batteries

Zhang, Yuchen; Wang, Jian; Bai, Zhongchao; Cao, Ruiguo; Wang, Nana; Dou, S. X.; Huang, Fuqiang

doi:10.1002/adma.202107183

Cited by 55 publications

(49 citation statements)

References 54 publications

(50 reference statements)

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Section: Gradient Design In Solid‐state Electrolytesmentioning

confidence: 99%

“…Recently, Pan et al proposed a quasi‐double‐layer composite polymer electrolyte (QDL‐CPE) by employing different plasticizers toward a high‐voltage cathode and highly reactive Li anode (Figure 7b). [ 100 ] Oxidation‐stable propylene carbonate (PC) was added to the SPE close to the cathode side and reductive‐stable diethylene glycol dimethyl ether (DGM) to the anode side. The in situ polymerization of PC enables the formation of a stable cathode electrolyte interphase (CEI) layer on the surface of LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NCM811) particles, while the interaction between DGM and PVDF SPE improves the reduction stability of SSE.…”

Section: Gradient Design In Solid‐state Electrolytesmentioning

confidence: 99%

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Gradient Design for High‐Energy and High‐Power Batteries

Zhang

et al. 2022

Advanced Materials

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lithium-ion batteries (LIBs) with intercalation-type cathodes, liquid electrolytes, and graphite anodes are approaching the energy-density limits; therefore, exploring new redox chemistries or battery configurations is needed to improve the performance of batteries. [3] On the one hand, high-capacity active materials (AMs) such as sulfur-or Li-rich cathodes are extensively explored to offer new chemistries for higher theoretical capacities. [4,5] On the other, increasing efforts are being made to optimize the microstructures of the cathode, anode, and electrolyte to improve the charge-transport kinetics and cell-level energy/power density. [6,7] Charge transport in batteries includes metal-ion transport in the electrolyte, charge transfer at the electrolyte/electrode interphase, solidstate diffusion inside the electrode, and electron transport along the conductive pathways. [8,9] At a low current density, the charge-transfer process dominates the electrochemical kinetics. As current density increases, ion diffusion in the electrolyte plays a major role. [10] Ion transport in the electrolyte is determined by the porous structure of the electrodes and separators. [11,12] In LIBs with a liquid electrolyte, ion diffusion in the porous electrodes is the rate-limiting process. The typical LIB electrodes are isotropic at the macroscale structure, made of a homogeneous mixture of AMs, conductive agents, binders, interconnected pores, etc. The limited ion mobility in the tortuous pores and the anisotropic electric field during operation inevitably cause heterogeneous mass transport through the thickness direction of the electrode. [13] Due to concentration gradients, the reaction kinetics can be different at different depths, and not all the AMs are accessed and activated at the same time. [14,15] The disparity in charge-transport dynamics and reaction kinetics results in underuse of the AMs and reaction polarization, especially at high C-rates, and at a certain C-rate, reaction polarization increases proportionally with electrode thickness due to the lengthened diffusion pathway. [16] Therefore, it is critical to design electrodes with a rational architecture to regulate charge transport. In particular, constructing electrodes with varying microstructures or compositions along the depth direction would allow us to reduce increasing resistances along the charge-transport direction and thus compensate the reaction polarization, which supports high energy and fast charging capacity.The lithium (Li)-metal anode, with the highest gravimetric energy density of 3860 mAh g −1 and the lowest redox potential (−3.04 V vs the standard hydrogen electrode), is considered the Charge transport is a key process that dominates battery performance, and the microstructures of the cathode, anode, and electrolyte play a central role in guiding ion and/or electron transport inside the battery. Rational design of key battery components with varying microstructure along the charge-transport direction to realize optimal local charge-transport dyn...

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Section: Gradient Design In Solid‐state Electrolytesmentioning

confidence: 99%

Section: Gradient Design In Solid‐state Electrolytesmentioning

confidence: 99%

Gradient Design for High‐Energy and High‐Power Batteries

Zhang

et al. 2022

Advanced Materials

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“…[169][170][171] However, additional resistance will be generated between the multilayer electrolyte layers, and this part of the resistance needs to be reduced as much as possible. Pan et al [172] proposed a new type of quasidouble-layer composite polymer electrolyte (Figure 12). The electrolyte is constructed by adding two different plasticizers to polyvinylidene fluoride (PVDF)-based CPE.…”

Section: Improving LI Wettability At Interfacementioning

confidence: 99%

“…However, though these methods are effective and valuable, Reproduced with permission. [172] Copyright 2021, Wiley-VCH GmbH. but they are hard to mass produce and expensive, more low-cost, environment-friendly, and simple methods need to be developed.…”

Section: Conclusion and Perspectivementioning

confidence: 99%

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Fast‐Charging Solid‐State Lithium Metal Batteries: A Review

Zhang

Shen

et al. 2022

Adv Energy and Sustain Res

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Nowadays solid‐state lithium metal batteries (SSLMBs) catch researchers’ attention and are considered as the most promising energy storage devices for their high energy density and safety. However, compared to lithium‐ion batteries (LIBs), the low ionic conductivity in solid‐state electrolytes (SSEs) and poor interface contact between SSEs and electrodes counteract some advantages of SSEs. As a result, SSLMBs show high energy density but low critical current density and slow charging speed. Herein, the recent progress and proposed strategies for fast‐charging SSLMBs are reviewed. In the second part of this review, various strategies for improving SSE performance in fast‐charging batteries are comprehensively highlighted. In the third part, various rational structure design schemes benefitting fast‐charging batteries are discussed. Finally, the development of fast‐charging SSLMBs is concluded and prospected. It is believed that the combination of fast‐charging times and SSLMBs is rather competitive for next‐generation, high energy density, high safety, and high charging rate energy storage devices.

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An Ultrathin Asymmetric Solid Polymer Electrolyte with Intensified Ion Transport Regulated by Biomimetic Channels Enabling Wide‐Temperature High‐Voltage Lithium‐Metal Battery

Yao

Ruan

Pan

et al. 2023

Advanced Energy Materials

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Lithium metal is being pursued extensively as a promising anode candidate to fabricate high energy density batteries owing to its ultrahigh specific capacity (3860 mAh g −1 ), lower density (0.59 g cm −3 ), and the lowest potential (−3.04 V vs H + /H 2 ). [1][2][3][4][5] Despite these outstanding merits, the commercialization of lithium metal batteries (LMBs) based on organic liquid electrolytes still confronting many great challenges, such as liquid leakage, flammability, and poor cycle ability, derived from the uncontrollable formation of Li dendrites. [6,7] Short circuits and severe heat release are generally caused by the continuous growth of Li dendrites, which will ignite the liquid organic electrolytes. [8,9] Solid-state electrolytes (i.e. polymer and ceramic electrolytes) may address these issues. [10][11][12][13] Compared with ceramic electrolytes, solid polymer electrolytes (SPEs) are considered as ideal candidates due to their low cost, ductility, and easy process ability. [14][15][16][17][18][19][20][21][22] However, their electrochemical stability and ionic conductivity need to be improved further to accelerate their applications in solid lithium metal batteries (SLMBs). [23][24][25][26] Even though SPEs are composed of many components, their electrochemical stability is mainly determined by the polymer matrices. [27,28] Many polymers of different electrochemical stability have been explored for the fabrication of LMBs since 1975. [29] However, no monophase polymer matrix was found to exhibit profound high-potential stability and reasonable lithium compatibility simultaneously due to its intrinsic limited energy gap. [30,31] Thus, LMBs with SPEs can only be constructed successfully by using modest potential cathodes, [32,33] which restricts their operating voltage and energy density. To improve the electrochemical stability of SPEs, numerous strategies have been proposed. For example, semi-interpenetrated polymer networks were proposed, [25,[34][35][36] but this strategy cannot intrinsically improve the electrochemical stability of the single polymer matrix, which would cause phase separation of Solid electrolytes that can be made compatible with high-voltage cathodes are greatly desired to increase the energy density of solid lithium metal batteries (SLMBs). However, no monophase polymer or ceramic examples can simultaneously exhibit strong electrochemical stability and reasonable lithium compatibility due to their limited internal energy gap. Herein, a novel asymmetric solid polymer electrolyte (AMSE) with tailored Li + transport mechanisms is proposed. It is composed of a high-voltage layer (HVL, polyacrylonitrile/ionic liquid [IL]) and lithium-compatible layer (LCL, poly(vinylidene fluoride-co-hexafluoropropylene)/UiO-66-SO 3 Li). The HVL exhibits a vehicular Li + transport mechanism with the introduction of IL, which achieves exceptional-electrochemical stability and reduced interfacial resistance. Due to the complexation between anions and UiO-66-SO 3 Li, a structural diffusion mechanism is ach...

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A Quasi‐Double‐Layer Solid Electrolyte with Adjustable Interphases Enabling High‐Voltage Solid‐State Batteries

Cited by 55 publications

References 54 publications

Gradient Design for High‐Energy and High‐Power Batteries

Gradient Design for High‐Energy and High‐Power Batteries

Fast‐Charging Solid‐State Lithium Metal Batteries: A Review

An Ultrathin Asymmetric Solid Polymer Electrolyte with Intensified Ion Transport Regulated by Biomimetic Channels Enabling Wide‐Temperature High‐Voltage Lithium‐Metal Battery

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