Dendrite-free lithium metal solid battery with a novel polyester based triblock copolymer solid-state electrolyte

Zhang, Bohao; Liu, Yulong; Pan, Xiumei; Liu, Jia; Doyle‐Davis, Kieran; Sun, Liqun; Li, Jun; Jiao, Xuefeng; Jing, Jie; Xie, Haiming; Sun, Xueliang

doi:10.1016/j.nanoen.2020.104690

Cited by 82 publications

(53 citation statements)

References 68 publications

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“…The region where the voltage range is ±60 mV as presented in Figure 1f was selected for the calculations. [ 37 ] The i o of the FeTaPc@rGO cell was calculated to be 1.0 mA cm −2 , which is significantly higher than those of the cells containing the rGO modified (0.7 mA cm −2 ) and pristine (0.5 mA cm −2 ) separators. This suggests that the high t + environment created by the FeTaPc@rGO modified separator leads to the formation of an SEI with the composition that facilitates the migration of Li + through it.…”

Section: Resultsmentioning

confidence: 99%

“…Tafel plots were obtained at a scan rate of 5 mV s −1 in the voltage range between −250 and +250 mV, of which the voltage range of −60 to 60 mV was selected for the calculation of i o . [ 37,55 ] t + was measured using CR2025 coin cells with the method by Bruce et al. [ 56 ] Two Li foils were used as working and counter electrodes, 1 m LiTFSI with 2 wt.% LiNO 3 in DME/DOL was used as the electrolyte.…”

Section: Methodsmentioning

confidence: 99%

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Dendrite‐Free Li Metal Anodes and the Formation of Plating Textures with a High Transference Number Modified Separator

et al. 2021

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The application of Li metal anodes is currently hindered by the uncontrolled growth of Li dendrites. Herein, the effects of a modified separator with a high Li+ transference number (t+) on the structure and electrochemical performance of Li metal anodes are reported. Stable and dendrite‐free plating/stripping cycles are achieved under current densities up to 5 mA cm−2 and areal capacities up to 20 mAh cm−2. The uniformly grown Li grains under the high t+ environment also exhibit well‐defined textures (preferred orientations). At a low plating capacity, epitaxial growth takes place on the {100} textures already existing in the rolled Li foils and the uniform Li+ flux strengthens this preferred orientation. Increasing the plating capacity to 20 mAh cm−2, the later‐grown textures change to {110} due to the reduced space charges and alleviated transport limits of Li+ under the high t+ environment, which favor the exposure of the close‐packed {110} planes. Compression‐induced <111> fiber textures are also resolved and the content increases with the plating capacity. Identification of the textures is meaningful for the exploration of advanced epitaxial substrates beyond Cu foils for high‐energy‐density Li metal batteries. LiS pouch cells are finally evaluated for the potential application of the modified separator.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Dendrite‐Free Li Metal Anodes and the Formation of Plating Textures with a High Transference Number Modified Separator

et al. 2021

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“…This increases the mechanical strength and the cycling stability of the SPE [246]. Similar results can also be achieved by using a polyester-based triblock structure [247]. By combining different kinds of polymers in regular-random network structures, it is possible to regulate the lithium deposition by facilitating the formation of a regular and robust SEI in lithium metal [253].…”

Section: Solid Polymer Electrolytesmentioning

confidence: 65%

Recent Advances on Materials for Lithium-Ion Batteries

et al. 2021

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Environmental issues related to energy consumption are mainly associated with the strong dependence on fossil fuels. To solve these issues, renewable energy sources systems have been developed as well as advanced energy storage systems. Batteries are the main storage system related to mobility, and they are applied in devices such as laptops, cell phones, and electric vehicles. Lithium-ion batteries (LIBs) are the most used battery system based on their high specific capacity, long cycle life, and no memory effects. This rapidly evolving field urges for a systematic comparative compilation of the most recent developments on battery technology in order to keep up with the growing number of materials, strategies, and battery performance data, allowing the design of future developments in the field. Thus, this review focuses on the different materials recently developed for the different battery components—anode, cathode, and separator/electrolyte—in order to further improve LIB systems. Moreover, solid polymer electrolytes (SPE) for LIBs are also highlighted. Together with the study of new advanced materials, materials modification by doping or synthesis, the combination of different materials, fillers addition, size manipulation, or the use of high ionic conductor materials are also presented as effective methods to enhance the electrochemical properties of LIBs. Finally, it is also shown that the development of advanced materials is not only focused on improving efficiency but also on the application of more environmentally friendly materials.

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“…In addition, polyesters are not as toxic as polyurethanes and, therefore, are more suitable for the use in structural health monitoring of infrastructural buildings. [40] The use of carbonyl-coordinating polymers in the form of carbonates such as poly(ethylene carbonate) [41] or poly(trimethylene carbonate) [42] or polyesters such as poly(caprolactones) [43][44][45] or poly(lactic acids) has additional advantages due to the interaction between the Li + ions and the carbonyl function. High dielectric constants of these polymers lead to effective charge separation of the salts, which further results in high concentration of charge carriers [20,30].…”

Section: Introductionmentioning

confidence: 99%

“…This causes faster ion transport (high Li + transport number) [41,46]. The balance of ion coordination, segmental mobility, and ion pairing plays a key role in current research [13,46] and can be tuned for example by the use of copolymers, [36,42,43,47,48] blends [49], or inorganic fillers [50][51][52][53][54]. Johansson et al synthesised polyester/ polycarbonate SPEs for high-temperature applications via UV radiation with good ionic conductivity~10 −4 S•cm −1 and long cycle periods [55].…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects in cross-linked blends of ion-conducting PEO-/PPO-based unsaturated polyesters

Sassmann

Weichold

2021

Ionics

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Ion-conductive unsaturated polyesters (UP) were synthesised from poly(ethylene oxide) (Xn = 9, 13, 22, 90) or poly(propylene oxide) (Xn = 7, 13, 20, 34, 68) and maleic anhydride. Subsequently, the polyesters were doped with LiClO4 and cross-linked with styrene using a redox initiator. For PEO-based polyesters, the minimum resistivity is found at an O/Li+ molar ratio of 50/1. In contrast, more lithium is required to reach the minimum when using PPO (O/Li+ = 10/1). Unlike the PEO-based polyesters, cross-linking of the PPO types gives rise to decreasing resistivities at increasing molecular weight. This correlates well with the transverse proton relaxation time determined by single-sided NMR, which is an indicator of the chain mobility. The cross-linking reaction of these UP with styrene exactly follows the predictions based on the copolymerisation parameters and is, therefore, not dependent on the ratio of styrene to UP double bonds as previously reported. Due to the opposing effects of the molecular weight on the ion conductivity of PEO- and PPO-based UP, 1:1 blends of short-chain PPO and long-chain PEO polyesters were cross-linked with styrene. The resulting networks showed a resistivity of 4 kΩ m (σ = 2.5∙10−4 S∙m−1), which is 5 times lower than the pure PEO and 3 times lower than the pure PPO materials.

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Dendrite-free lithium metal solid battery with a novel polyester based triblock copolymer solid-state electrolyte

Cited by 82 publications

References 68 publications

Dendrite‐Free Li Metal Anodes and the Formation of Plating Textures with a High Transference Number Modified Separator

Dendrite‐Free Li Metal Anodes and the Formation of Plating Textures with a High Transference Number Modified Separator

Recent Advances on Materials for Lithium-Ion Batteries

Synergistic effects in cross-linked blends of ion-conducting PEO-/PPO-based unsaturated polyesters

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