Effect of continuous pressures on electrochemical performance of Si anodes

Cui, Jin; Chen, X.; Zhou, Zehua; Zuo, Mingming; Xiao, Yao; Zhao, Ning; Shi, Chuan; Guo, Xiangxin

doi:10.1016/j.mtener.2020.100632

Cited by 23 publications

(24 citation statements)

References 39 publications

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“…The transition metal oxide/porous polyolefin separator/graphite becomes the classical battery system based on subverting the lithium/MnO 2 battery system, which suffers from serious safety challenges caused by the dendrite lithium. Nowadays, with the rapid development of electric vehicles and grid energy storage, there are imperious demands in the high power and capacity density of the batteries. − Since several alternative cathode materials have achieved commercial application, the breakthrough of the high-capacity anode, to substitute the commercial graphite anode which only has a specific capacity of 340 mAh g –1 , determines the upper limit of the battery density. , Therefore, the research of lithium metal anode becomes the focus again with the development of new materials and technologies. , However, safety concerns caused by dendrite lithium growth as well as the volume change and thermal shock still restrict its conversion from the laboratory to the factory. − …”

Section: Introductionmentioning

confidence: 99%

Ion Flux Self-Regulation Strategy with a Volume-Responsive Separator for Lithium Metal Batteries

Shi

Zhang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Lithium metal batteries (LMBs) are regarded as one of the most promising next-generation energy storage devices due to their high energy density. However, the conversion of LMBs from laboratory to factory is hindered by the formation of lithium dendrites and volume change during lithium stripping and deposition processes. In this work, a volume-responsive separator with core/ shell structure thermoplastic polyurethane (TPU)/polyvinylidene fluoride (PVDF) fibers and SiO 2 coating layers is designed to restrict dendrite growth. The TPU/PVDF−SiO 2 separator can accommodate the volume change like an artificial lung and keep intimate contact with the electrodes, which leads to the formation of a uniform and high-density solid−electrolyte interphase. Meanwhile, the separator can regulate the transport channels and diffusion coefficients (D) of lithium ions with the change of porosity from both experimental and ab initio molecular dynamic analysis. The Li symmetric cells assembled with the TPU/ PVDF−SiO 2 can run for 1000 h at the current of 1.0 mA cm −2 without a short circuit. Moreover, the low melting point of PVDF can shut the ionic conduction down at 170 °C, guaranteeing the thermal safety of the batteries. With the above advantages, the TPU/PVDF−SiO 2 separator presents great potential to promote the commercial and industrial application of LMBs.

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Section: Introductionmentioning

confidence: 99%

Ion Flux Self-Regulation Strategy with a Volume-Responsive Separator for Lithium Metal Batteries

Shi

Zhang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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“…However, LIB will have serious overcharge, short circuit, and structural damage problems under high pressure. [21][22][23][24] Fortunately, zinc-ion battery (ZIB) with solid electrolyte is one of the promising electrochemical energy storage systems. It not only has the advantages of enhanced electrochemical performance, high safety, low manufacturing cost, high content of natural elements, and environmental protection, but also maintains additional load-bearing performance.…”

mentioning

confidence: 99%

A Zinc‐Ion Battery‐Type Self‐Powered Pressure Sensor with Long Service Life

et al. 2022

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Accurate and continuous pressure signal detection without external power supply is a key technology to realize the miniaturization of wearable electronic equipment, the internet of things, and artificial intelligence. However, it is difficult to be achieved by using current sensor technologies. Here, a new one‐body strategy, i.e., zinc‐ion battery pressure (ZIB‐P) sensor technology, which designs the rechargeable solid‐state ZIB itself as a flexible pressure sensor is reported. In the device, an isolation layer is introduced into the sandwich configuration solid‐state battery to realize the change of device internal resistance by pressure during the transformation of the mechanical signal to the electrical signal. This battery pressure sensor possesses good flexibility, fast response/recovery time (76.0/88.0 ms), stable long‐term response, excellent cycle stability (100 000 times), and wide pressure detection range (2.0 to 3.68 × 105 Pa). Especially, the excellent charge–discharge performance in the ZIB‐P sensor endows it with the real‐time detection ability of human vital signs (pulse, limb movement, etc.) and ultrahigh stability without degradation even under 100 000 times pressure stimulation. The ZIB‐P sensor strategy provides a new solution for the future development of miniaturized wearable electronic devices.

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“…The well-overlapped curves with each other further proved the good reversibility and the strong immobilization ability of LiPSs ( Liu, et al, 2019 ). EIS of the Li-S batteries with PP separator, rGO, and CoS 2 /rGO modified separators before cycling and after 50 cycles was conducted and shown in Figure 4D ; the diameter of the semicircle in the low-frequency region represents the charge transfer resistance (R ct ) ( Deng et al, 2013 ; Cui et al, 2021 ). It can be seen that fresh cells with CoS 2 /rGO modified separator exhibited the smallest R ct value when compared with PP separator and rGO modified separator, which indicates that CoS 2 uniformly attached in rGO could effectively ensure fast transmission for Li + migration and reduce the charge transfer resistance.…”

Section: Resultsmentioning

confidence: 99%

Energy-Saving Synthesis of Functional CoS2/rGO Interlayer With Enhanced Conversion Kinetics for High-Performance Lithium-Sulfur Batteries

Feng

Yuan

et al. 2022

Front. Chem.

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Lithium sulfur (Li-S) battery has exhibited great application potential in next-generation high-density secondary battery systems due to their excellent energy density and high specific capacity. However, the practical industrialization of Li-S battery is still affected by the low conductivity of sulfur and its discharge product (Li2S2/Li2S), the shuttle effect of lithium polysulfide (Li2Sn, 4 ≤ n ≤ 8) during charging/discharging process and so on. Here, cobalt disulfide/reduced graphene oxide (CoS2/rGO) composites were easily and efficiently prepared through an energy-saving microwave-assisted hydrothermal method and employed as functional interlayer on commercial polypropylene separator to enhance the electrochemical performance of Li-S battery. As a physical barrier and second current collector, the porous conductive rGO can relieve the shuttle effect of polysulfides and ensure fast electron/ion transfer. Polar CoS2 nanoparticles uniformly distributed on rGO provide strong chemical adsorption to capture polysulfides. Benefitting from the synergy of physical and chemical constraints on polysulfides, the Li-S battery with CoS2/rGO functional separator exhibits enhanced conversion kinetics and excellent electrochemical performance with a high cycling initial capacity of 1,122.3 mAh g−1 at 0.2 C, good rate capabilities with 583.9 mAh g−1 at 2 C, and long-term cycle stability (decay rate of 0.08% per cycle at 0.5 C). This work provides an efficient and energy/time-saving microwave hydrothermal method for the synthesis of functional materials in stable Li-S battery.

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Effect of continuous pressures on electrochemical performance of Si anodes

Cited by 23 publications

References 39 publications

Ion Flux Self-Regulation Strategy with a Volume-Responsive Separator for Lithium Metal Batteries

Ion Flux Self-Regulation Strategy with a Volume-Responsive Separator for Lithium Metal Batteries

A Zinc‐Ion Battery‐Type Self‐Powered Pressure Sensor with Long Service Life

Energy-Saving Synthesis of Functional CoS2/rGO Interlayer With Enhanced Conversion Kinetics for High-Performance Lithium-Sulfur Batteries

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