Hierarchical MCMB/CuO/Cu anode with super-hydrophilic substrate and blind-hole structures for lithium-ion batteries

Yuan, Wei; Yan, Zhiguo; Pan, Baoyou; Qiu, Zhiqiang; Luo, Jian; Tan, Zhenhao; Tang, Yong

doi:10.1016/j.jallcom.2017.05.195

Cited by 11 publications

(8 citation statements)

References 57 publications

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“…A peak was found at 0.44 V during the first anodic scan, attributing to the phase transition of Li x Ge to Ge; then, two distinct peaks at ∼1.5 and ∼2.5 V and a shoulder peak at ∼2.7 V appeared, which was associated with oxidation of Cu 0 to Cu + and Cu 2+ (Dong et al, 2016;Xu et al, 2016;Wang et al, 2018). These results are in agreement with the other reports of electrochemical reactions of Ge and CuO with Li (Seo et al, 2011;Ren et al, 2013;Xinghui et al, 2014;Wei et al, 2017;Lin et al, 2018;Wang et al, 2018). The CV curves were well-overlapped with each other from the second cycle afterwards, suggesting that the electrode has a good reversibility.…”

Section: Resultssupporting

confidence: 90%

A Hierarchical Copper Oxide–Germanium Hybrid Film for High Areal Capacity Lithium Ion Batteries

Deng

et al. 2020

Front. Chem.

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Self-supported electrodes represent a novel architecture for better performing lithium ion batteries. However, lower areal capacity restricts their commercial application. Here, we explore a facial strategy to increase the areal capacity without sacrificing the lithium storage performance. A hierarchical CuO-Ge hybrid film electrode will not only provide high areal capacity but also outstanding lithium storage performance for lithium ion battery anode. Benefiting from the favorable structural advance as well as the synergic effect of the Ge film and CuO NWs array, the hybrid electrode exhibits a high areal capacity up to 3.81 mA h cm −2 , good cycling stability (a capacity retention of 90.5% after 150 cycles), and superior rate performance (77.4% capacity remains even when the current density increased to 10 times higher).

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Section: Resultssupporting

confidence: 90%

A Hierarchical Copper Oxide–Germanium Hybrid Film for High Areal Capacity Lithium Ion Batteries

Deng

et al. 2020

Front. Chem.

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“…The current collector was composed of a round blind hole array and CuO clusters on the entire surface. The LIBs with this anode showed an enhanced capacity of 276.7 mAh g −1 . With the combined effect of the surface structure and the nanostructured film, the aforementioned current collectors were endowed with a large electrochemical reaction interface, a stable electrode structure, and a small impedance, so that the anodes with the current collectors showed an improved reversible capacity and rate capability.…”

Section: Introductionmentioning

confidence: 99%

Honeycomb‐Inspired Surface‐Patterned Cu@CuO Composite Current Collector for Lithium‐Ion Batteries

et al. 2019

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The interface design between the current collector and active materials has a non‐negligible effect on the performance of lithium‐ion batteries (LIBs). Inspired by the honeycomb with a large specific surface area, this work validates the use of a surface‐patterned cellular Cu@CuO composite current collector with a hexagonal blind hole array and a nanostructured film of CuO nanoflowers for LIBs. This unique structure is synthesized by lithography and solution immersion. Mesocarbon microbead graphite powders are used as the active materials. Results show that the battery with the cellular Cu@CuO current collector maintains a reversible charge capacity of 354.1 mAh g−1 at 100 mA g−1 after 200 cycles. Compared with the Cu‐based current collector with a hexagonal blind hole array and a bare Cu current collector, the new pattern gains a performance improvement in the reversible capacity by 27.9% and 153.2%, respectively. The excellent electrochemical property of the cellular Cu@CuO current collector can be ascribed to strengthened adhesion with the active materials, reduced contact resistance, and improved Li‐ion diffusion capability. Due to the enhanced electrochemical performance, facile preparation processes, and cost‐effective raw materials, the new current collector shows great potential to replace the conventional current collector of energy storage systems.

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“…It can be seen from Figure a that under the effects of the grooves and carbon nanofibers, the battery with the new current collector exhibits a much higher initial discharge voltage (2.42 V) and capacity (691.7 mAh g −1 ) than that with a complanate one (1.498 V and 267.9 mAh g −1 , respectively). The extra capacity beyond the theoretical value of pure graphite (372 mAh g −1 ) should derive from the irreversible side reactions including the formation of the solid electrolyte interface (SEI) during the first discharge, as illustrated in Figure b. However, as shown in Figure S3b in the Supporting Information, these side reactions gradually disappear in the subsequent cycles since a stable SEI film has been formed on the surface of the electrode, obstructing the further consumption of the electrolyte.…”

Section: Resultsmentioning

confidence: 97%

“…In this case, hierarchical composite current collectors with special nanostructures have great potential to improve the performance of future commercial LIBs. It is believed that nanostructured current collector films with excellent lithium storage properties may not only enhance lithiation/delithiation of the electrode materials but also increase the mechanical strength of the electrode, as reported in the literature . Thus, the performance of a battery, including reversible capacity, rate capability, and cycle life, may be greatly improved by modifying the surface structures and compositions of the hierarchical composite current collector.…”

Section: Introductionmentioning

confidence: 91%

From Checkerboard‐Like Sand Barriers to 3D Cu@CNF Composite Current Collectors for High‐Performance Batteries

et al. 2018

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While the architecture, surface morphology, and electrical conductivity of current collectors may significantly affect the performance of electrochemical cells, many challenges still remain in design and cost‐effective fabrication of highly efficient current collectors for a new generation of energy storage and conversion devices. Here the findings in design and fabrication of a 3D checkerboard‐like Cu@CNF composite current collector for lithium‐ion batteries are reported. The surface of the current collector is modified with patterned grooves and amorphous carbon nanofibers, imitating the checkerboard‐like sand barriers in desert regions. Due to a combined effect of the grooves and the carbon nanofibers, a battery based on this current collector retains a reversible capacity of 410.1 mAh g−1 (beyond the theoretical capacity of carbonaceous materials of 372 mAh g−1) with good capacity retention (greater than 84.9% of the initial capacity after 50 cycles), resulting in 66.2% and 42.6% improvement in reversible capacity and capacity retention, respectively, compared to the batteries using traditional Cu current collectors. Based on the excellent electrochemical performance, this composite current collector is believed to be an attractive alternative to the traditional commercially used current collectors for the anode of high‐power energy storage systems.

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Hierarchical MCMB/CuO/Cu anode with super-hydrophilic substrate and blind-hole structures for lithium-ion batteries

Cited by 11 publications

References 57 publications

A Hierarchical Copper Oxide–Germanium Hybrid Film for High Areal Capacity Lithium Ion Batteries

A Hierarchical Copper Oxide–Germanium Hybrid Film for High Areal Capacity Lithium Ion Batteries

Honeycomb‐Inspired Surface‐Patterned Cu@CuO Composite Current Collector for Lithium‐Ion Batteries

From Checkerboard‐Like Sand Barriers to 3D Cu@CNF Composite Current Collectors for High‐Performance Batteries

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