Protecting Al foils for high-voltage lithium-ion chemistries

Gao, Han; Ma, Tianyuan; Duong, Thy; Wang, Li; He, Xiangming; Lyubinetsky, Igor; Feng, Zhenxing; Maglia, Filippo; Lamp, Peter; Amine, Khalil; Chen, Zonghai

doi:10.1016/j.mtener.2017.12.001

Cited by 28 publications

(23 citation statements)

References 40 publications

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“…Pristine and coated NMC 622 working electrodes with a composition of 91.5 wt % NMC 622, 4.4 wt % C45 carbon black, and 4.1 wt % polyvinylidene fluoride binder were prepared as described in our pervious papers. , The loading of NMC 622 on each electrode was ca. 20 mg. CR2032 half-cells were then constructed in an Ar-filled glovebox using Celgard 2325 separators, metallic Li counter electrodes, and a LiPF 6 -based electrolyte (LP-57, BASF, 1.0 M LiPF 6 in EC/EMC, 3:7 by weight).…”

Section: Experimental Sectionmentioning

confidence: 99%

“…This procedure was repeated for one full cycle between 2.8 and 4.4 V vs Li/Li + . Electrochemical impedance spectroscopy (EIS) of the half-cells was performed with the setup as described in our pervious papers. , A home-built high-precision leakage current measuring system was used to obtain the leakage current for electrodes holding at specific potentials at 30 °C …”

Section: Experimental Sectionmentioning

confidence: 99%

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Modifying the Surface of a High-Voltage Lithium-Ion Cathode

Gao

Zeng

et al. 2018

ACS Appl. Energy Mater.

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Ni-rich lithium nickel manganese cobalt oxides (LiNi x Mn y Co1–x–y O2, NMCs) suffer from poor cycling stability at potentials above 4.2 V vs Li/Li+. This degraded cyclability at high potentials has been largely ascribed to the parasitic reactions between the delithiated cathode and the nonaqueous electrolyte. In this study, we mitigated the performance degradation of high-voltage NMC 622 by designing a functional interfacial layer that consists of a surface doping by Ti4+ and a TiO2 coating at the same time. The doping of Ti4+ near the surface of NMC can suppress the irreversible phase transformation, while the TiO2 coating can kinetically reduce the rate of the electron-transfer reaction between the delithiated cathode and the solvent. It is revealed that this interfacial engineering approach significantly enhanced both the cycling stability and the rate performance of NMC 622.

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Section: Experimental Sectionmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Modifying the Surface of a High-Voltage Lithium-Ion Cathode

Gao

Zeng

et al. 2018

ACS Appl. Energy Mater.

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“…Unlike PF 6 based salts, electrolytes based on TFSIand FSIare unable to passivate the Al foil current collector, and especially under the high working potential at the cathode side, the continuous corrosion of Al foil current collector leads to the low Coulombic efficiency of DIBs. [73] In addition, before the widespread application of TFSIand FSIbased salts, their cost should be carefully concerned.…”

Section: High-concentration Electrolytementioning

confidence: 99%

Advances and Prospects of Dual‐Ion Batteries

Gong

Han

et al. 2021

Advanced Energy Materials

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“…Accordingly, many approaches have been studied to alleviate the volume change concern, including the fabrication of composites, nanoparticles, nanowires, nanorods, 3D frameworks, and yolk–shell structures; however, using Al foil directly as both the anode and current collector seems to be the best way to save costs in manufacturing . In addition, the corrosion of Al foil under nonaqueous electrolytes has been intensively studied, which can be delayed through the use of a protective layer, as shown by AlPO 4 coating used by Gao et al As such, to accommodate the Al volume change during cycling and resist electrode corrosion, we think a flexible polymeric protecting layer might provide dual benefits toward enhanced Al anode functionality.…”

Section: Introductionmentioning

confidence: 99%

Biomass‐Derived Poly(Furfuryl Alcohol)–Protected Aluminum Anode for Lithium‐Ion Batteries

Han

Chen

et al. 2019

Energy Tech

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Aluminum is one of the promising alternative anode materials due to its high specific capacity. However, some critical problems seriously limit its practical applications, such as the low coulombic efficiency and poor cycle performance resulting from the huge volume change during cycling. Herein, a novel poly(furfuryl alcohol)/carbon black binder composite is coated on the surface of aluminum foil as a robust and conductive protective layer to maintain the integrity of the hybrid aluminum anode. The results show that 150 cycles under the preset cutoff capacity loading of 400 mA h g−1 are obtained and exhibit obvious advantages over a bare aluminum anode, which will crack after just 25 cycles. For full‐cell testing paired with a LiFePO4 cathode, the cell using the hybrid aluminum anode has a better capacity retention against the unprotected aluminum anode.

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Protecting Al foils for high-voltage lithium-ion chemistries

Cited by 28 publications

References 40 publications

Modifying the Surface of a High-Voltage Lithium-Ion Cathode

Modifying the Surface of a High-Voltage Lithium-Ion Cathode

Advances and Prospects of Dual‐Ion Batteries

Biomass‐Derived Poly(Furfuryl Alcohol)–Protected Aluminum Anode for Lithium‐Ion Batteries

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