An SiOx anode strengthened by the self-catalytic growth of carbon nanotubes

Nanoscale ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3808-3816
Author(s):  
Hongjin Xue ◽  
Yong Cheng ◽  
Qianqian Gu ◽  
Zhaomin Wang ◽  
Yabin Shen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Volume Change ◽  
Large Volume ◽  
The Self ◽  
Catalytic Growth ◽  
Large Volume Change

A close-knit CNTs coating that in-situ grown on the SiOx particles realizes the “soft-combination” between SiOx and CNTs, thus conquering the long-lasting issues of poor conductivity and large volume change of SiOx faced.

scholarly journals Investigation on Fabrication of Reduced Graphene Oxide-Sulfur Composite Cathodes for Li-S Battery via Hydrothermal and Thermal Reduction Methods

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 861
Author(s):  
Zhiqi Li ◽  
Hao Sun ◽  
Yuepeng Pang ◽  
Mingming Yu ◽  
Shiyou Zheng
Keyword(s):  
Graphene Oxide ◽  
Volume Change ◽  
Large Volume ◽  
Thermal Reduction ◽  
Reduced Graphene ◽  
Composite Cathodes ◽  
Reduction Methods ◽  
One Step ◽  
Large Volume Change

Lithium-sulfur (Li-S) battery is considered one of the possible alternatives for next-generation high energy batteries. However, its practical applications are still facing great challenges because of poor electronic conductivity, large volume change, and polysulfides dissolution inducing “shuttle reaction” for the S cathode. Many strategies have been explored to alleviate the aforementioned concerns. The most common approach is to embed S into carbonaceous matrix for constructing C-S composite cathodes. Herein, we fabricate the C-S cathode reduced graphene oxide-S (rGO-S) composites via one step hydrothermal and in-situ thermal reduction methods. The structural features and electrochemical properties in Li-S cells of the two type rGO-S composites are studied systematically. The rGO-S composites prepared by one step hydrothermal method (rGO-S-HT) show relatively better comprehensive performance as compared with the ones by in-situ thermal reduction method (rGO-S-T). For instance, with a current density of 100 mA g−1, the rGO-S-HT composite cathodes possess an initial capacity of 1290 mAh g−1 and simultaneously exhibit stable cycling capability. In particular, as increasing the current density to 1.0 A g−1, the rGO-S-HT cathode retains a reversible capacity of 582 mAh g−1 even after 200 cycles. The enhanced electrochemical properties can be attributed to small S particles uniformly distributed on rGO sheets enabling to significantly improve the conductivity of S and effectively buffer large volume change during lithiation/delithiation.

In Situ TEM Observations on the Sulfur-Assisted Catalytic Growth of Single-Wall Carbon Nanotubes

2014 ◽  
Vol 5 (8) ◽  
pp. 1427-1432 ◽  
Author(s):  
Lili Zhang ◽  
Peng-Xiang Hou ◽  
Shisheng Li ◽  
Chao Shi ◽  
Hong-Tao Cong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
In Situ Tem ◽  
Catalytic Growth ◽  
Single Wall Carbon

Bio-Inspired Soft Swim Bladders of Large Volume Change Using Dual Dielectric Elastomer Membranes

2020 ◽  
Vol 87 (4) ◽  
Author(s):  
Yingxi Wang ◽  
Leon Yeong Wei Loh ◽  
Ujjaval Gupta ◽  
Choon Chiang Foo ◽  
Jian Zhu
Keyword(s):  
Volume Change ◽  
Large Volume ◽  
Vertical Motion ◽  
Fast Response ◽  
Dielectric Elastomer ◽  
Control Mechanisms ◽  
Swim Bladder ◽  
Response Light ◽  
Large Volume Change ◽  
Buoyancy Control

Abstract The buoyancy control mechanism is critical for undersea robots to achieve effective vertical motion. However, current buoyancy control mechanisms are associated with problems such as complex design, bulky structure, noisy operation, and slow response. Inspired by the swim bladder of natural fish, we develop an artificial swim bladder, using dual membranes of the dielectric elastomer, which exhibit interesting attributes, including fast response, light weight, silent operation, especially large volume change. Both the experiments and theoretical simulations are conducted to analyze the performance of this artificial swim bladder, and they quantitatively agree with each other. This artificial swim bladder of dual membranes is capable of large voltage-induced volume change, 112% larger than the conventional single-membrane design. Consequently, this soft actuator can generate a buoyancy force of 0.49 N. This artificial swim bladder demonstrates effective up-and-down motion in water, due to its large reversible volume change. Future work includes adding horizontal-motion and turning capabilities to the existing robotic structure, so that the soft robotic fish can achieve successful navigation in undersea environments.

A pomegranate-inspired nanoscale design for large-volume-change lithium battery anodes

2014 ◽  
Vol 9 (3) ◽  
pp. 187-192 ◽  
Author(s):  
Nian Liu ◽  
Zhenda Lu ◽  
Jie Zhao ◽  
Matthew T. McDowell ◽  
Hyun-Wook Lee ◽  
...  
Keyword(s):  
Volume Change ◽  
Large Volume ◽  
Lithium Battery ◽  
Large Volume Change

Dodecylamine-derived thin carbon-coated single Fe3O4 nanocrystals for advanced lithium ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 37923-37928 ◽  
Author(s):  
Min-Young Cho ◽  
Seung-Beom Yoon ◽  
Kwang-Bum Kim ◽  
Dae Soo Jung ◽  
Kwang Chul Roh
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Volume Change ◽  
Large Volume ◽  
Lithium Ion ◽  
Solvothermal Process ◽  
Excellent Electrochemical Performance ◽  
Thin Carbon ◽  
Carbon Coated ◽  
Large Volume Change

Thin carbon-coated single Fe3O4 nanocomposite were synthesized by a solvothermal process using dodecylamine. The composite structure can accommodate the large volume change of Fe3O4 and thus enabled excellent electrochemical performance.

In situ catalytic growth of carbon nanotubes on the surface of carbon cloth

2007 ◽  
Vol 67 (14) ◽  
pp. 2986-2989 ◽  
Author(s):  
Qiao-Juan Gong ◽  
He-Jun Li ◽  
Xiang Wang ◽  
Qian-Gang Fu ◽  
Zhao-wei Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Cloth ◽  
Catalytic Growth

Ni-Fe Competition in the Catalytic Growth of Carbon Nanotubes

2006 ◽  
Vol 963 ◽  
Author(s):  
Vladimir. Z. Mordkovich ◽  
D. N. Kharitonov ◽  
I. A. Maslov ◽  
E. B. Mitberg
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Carbon Nanostructures ◽  
Oxidation Process ◽  
Steel Alloy ◽  
Catalytic Growth ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Perovskite Type

ABSTRACTThe paper presents the results of competitive catalysis investigation of the carbon nanotube growth in situ of the partial oxidation process of methane. The competition between Ni and Fe results in suppression of Ni catalytic activity and the growth of Fe-capped carbon nanotubes. The discrimination is so strong that iron is segregated from Ni-Fe based stainless steel alloy leaving characteristic Ni-enriched corrosion caverns. The process strongly depends on temperature. Depending on particular catalyst bed composition, the nanotubes of various morphology may occur. In particular, the use of perovskite-type catalyst leads to formation of “olive-branch”-like peculiar carbon nanostructures.

A nitrogen-doped-carbon/ZnO modified Cu foam current collector for high-performance Li metal batteries

2019 ◽  
Vol 7 (10) ◽  
pp. 5712-5718 ◽  
Author(s):  
Ying Zhou ◽  
Kai Zhao ◽  
Yu Han ◽  
Zhenhe Sun ◽  
Hongtao Zhang ◽  
...  
Keyword(s):  
Volume Change ◽  
Large Volume ◽  
High Performance ◽  
Current Collector ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Cu Foam ◽  
Large Volume Change ◽  
Metal Anodes

The two most challenging issues for Li metal anodes are large volume change during the plating/stripping process and the growth of Li dendrites induced by uneven Li deposition.

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