Swallowing Lithium Dendrites in All‐Solid‐State Battery by Lithiation with Silicon Nanoparticles

Tao, Jianming; Wang, Daoyi; Yang, Yue; Li, Jiaxin; Huang, Zhigao; Mathur, Sanjay; Hong, Zhensheng; Lin, Yingbin

doi:10.1002/advs.202103786

Cited by 37 publications

(23 citation statements)

References 53 publications

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“…Third, regulation of lithiophilicity of host materials is also beneficial in all‐solid‐state batteries by controlling the Li nucleation and deposition behaviors to render low polarization and long lifespan. [ 224,225 ] The density of the host materials should be as low as possible to render a high energy density of practical pouch cells. [ 226 ] Finally, facile fabrication process of SSE with low cost is preferred to realize the practical applications of solid‐state LMBs.…”

Section: Regulation Strategiesmentioning

confidence: 99%

Working Principles of Lithium Metal Anode in Pouch Cells

Sun

Cheng

et al. 2022

Advanced Energy Materials

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Advanced energy storage technology represented by lithium (Li)-ion batteries (LIBs) has revolutionized human life in recent years. The energy density of LIBs based on intercalation chemistry is approaching its theoretical limit after unremitting efforts for the past three decades. The state-of-the-art LIBs with graphite anode can only achieve an energy density lower than 300 Wh kg −1 . [1] This cannot satisfy the increasing demands for portable electronic devices, electric vehicles, and stationary energy storage systems. [2] Therefore, it is urgently called for next-generation batteries with a high energy density, long lifespan, and high safety performance. [3,4] Electrode material is of great importance in determining the energy density of batteries. [5] As the holy grail anode, Li metal possesses the ultrahigh theoretical specific capacity (3860 mAh g −1 ) and low potential (−3.04 V vs the standard hydrogen electrode). The promising feature renders Li metal anode to be an indispensable candidate for constructing next-generation high-energy-density batteries. [6] A high energy density of 400 or even 500 Wh kg −1 can be achieved with Li metal batteries (LMBs) matching Ni-rich LiNi x Co y Mn (1−x−y) O 2 (0 < x, y <1), oxygen, or sulfur cathodes, etc. [7][8][9] However, the conversion chemistry and high reactivity of Li metal also bring great challenges to the design of robust LMBs with long lifespan and high safety. [10,11] Specifically, Li dendrite growth and infinite volume variation lead to unstable solid electrolyte interphase (SEI) on Li metal anodes, resulting in low Li utilization, capacity decline, and even safety risk, [12] severely hindering the practical applications of LMBs. [13][14][15] Recently, extensive strategies have been exploited to control the dendrite growth of Li metal anodes, including engineering electrolytes and additives, [16] designing 3D host structures, [17][18][19] constructing artificial SEI, [20,21] applying solid-state electrolyte (SSE), [22][23][24] and adjusting operation conditions. [25] A high Coulombic efficiency (>99.9%) and long lifespan (>1000 cycles) have been reported in the materials-level coin cells. [26][27][28] Notably, Li dendrite growth is primarily driven by the kinetical limitation of Li-ion diffusion near the electrolyte/electrode interface. Serious dendrite issues can be encountered under harsh operating conditions in pouch cells, considering the accelerated consumption of Li ions at large currents and high Lithium metal battery has been considered as one of the potential candidates for next-generation energy storage systems. However, the dendrite growth issue in Li anodes results in low practical energy density, short lifespan, and poor safety performance. The strategies in suppressing Li dendrite growth are mostly conducted in materials-level coin cells, while their validity in device-level pouch cells is still under debate. It is imperative to address dendrite issues in pouch cells to realize the practical application of Li metal batteries. This review prese...

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Section: Regulation Strategiesmentioning

confidence: 99%

Working Principles of Lithium Metal Anode in Pouch Cells

Sun

Cheng

et al. 2022

Advanced Energy Materials

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“…In between the nonelectrified layers, dynamic electrochemical stability can be identified due to the self-decomposition of a metastable phase [71] or traversed reactive agent from electrode. [56,70] This dynamic electrochemical stability results from the reversible ion migration and depletion, and accumulation of neutral metal. Generally, this electrochemical stability at the non-electrified interfaces multiplies the interface resistance while the decomposition products can be partially reversed.…”

Section: Electrochemical Stability In Hsementioning

confidence: 99%

“…Ceramic fillers including (non‐)Li + conducting are widely investigated in SPEs to improve the overall performance physically or electrochemically. [ 56 ] Fillers with the same composition or not are applied in various geometrical forms within the HSE. Liu and co‐workers introduced a double‐layered composite SSE incorporated with dispersed ceramic particles [ 24 ] ( Figure a).…”

Section: Application and Design Strategies Of Hsementioning

confidence: 99%

Vertically Heterostructured Solid Electrolytes for Lithium Metal Batteries

Tang

et al. 2022

Adv Funct Materials

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Solid‐state electrolytes (SSEs) have been regarded as the most attractive candidate for safe and high‐energy lithium (Li) batteries of the next generation. However, the inability of current SSEs to keep up with the performance requirements of batteries is significantly affected by complex factors, especially ionic conductivity, mechanochemical properties, and coupled ion/electron reaction at the electrified interfaces. Strategies in solid electrolyte chemistries and technologies are put forward to overcome these challenges while widening the breadth of possible applications. Among them, vertically heterostructured solid‐state electrolytes (HSE) are constructed as a most promising strategy, which can take advantage of individual SSE layers together and rationalize the stability and compatibility of electrodes. This review comprehensively summarizes the specific features of the HSE based on the current knowledge of SSE failure modes. Additionally, a detailed review of the recent progress on the HSE design in terms of organic polymer electrolytes and inorganic electrolytes is generated. Finally, the advantages and drawbacks of the design strategies are discussed. New perspectives about HSE are proposed as well.

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“…An alternative strategy has been developed to eliminate Li dendrite by introducing active materials, e.g. , Si 29 and I 2 , 30 into CPEs, because the growth of Li dendrites is inevitable and will eventually pierce the SEI film. Although the above-mentioned fillers are effective, multifunctional fillers that can simultaneously act as plasticizers, additives and active materials have not been reported.…”

Section: Introductionmentioning

confidence: 99%