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Yong Wang - One of the best experts on this subject based on the ideXlab platform.

  • confined volume change in sn co c ternary tube in tube composites for high capacity and long life lithium storage
    Advanced Functional Materials, 2013
    Co-Authors: Yan Gu, Fendan Wu, Yong Wang
    Abstract:

    All high capacity Li-alloy anodes for Li-ion battery suffer from enormous volume expansion and extraction during the lithium-ion insertion and extraction process. A Sn-Co-CNT@CNT ternary tube-in-tube nanoStructure is prepared by an in situ template technique and shows Perfect Structure suitability to solve the critical volume change problem. The morphology, size, and quantity of the filled CNT-supported Sn-Co nanoparticles can be also tuned by adjusting the experimental conditions to achieve optimal electrochemical performances. The tube-in-tube product exhibits larger-than-theoretical reversible capacities of 890–811 mA h g−1 at 0.1C in 200 cycles and excellent rate capability and high-rate cycling stability. The excellent electrochemical performance is mainly attributed to the confined volume change in the nanotube cavities and ensured permanent electrical connectivity of the immobilized Sn-Co anodes.

Yan Gu - One of the best experts on this subject based on the ideXlab platform.

  • confined volume change in sn co c ternary tube in tube composites for high capacity and long life lithium storage
    Advanced Functional Materials, 2013
    Co-Authors: Yan Gu, Fendan Wu, Yong Wang
    Abstract:

    All high capacity Li-alloy anodes for Li-ion battery suffer from enormous volume expansion and extraction during the lithium-ion insertion and extraction process. A Sn-Co-CNT@CNT ternary tube-in-tube nanoStructure is prepared by an in situ template technique and shows Perfect Structure suitability to solve the critical volume change problem. The morphology, size, and quantity of the filled CNT-supported Sn-Co nanoparticles can be also tuned by adjusting the experimental conditions to achieve optimal electrochemical performances. The tube-in-tube product exhibits larger-than-theoretical reversible capacities of 890–811 mA h g−1 at 0.1C in 200 cycles and excellent rate capability and high-rate cycling stability. The excellent electrochemical performance is mainly attributed to the confined volume change in the nanotube cavities and ensured permanent electrical connectivity of the immobilized Sn-Co anodes.

Fendan Wu - One of the best experts on this subject based on the ideXlab platform.

  • confined volume change in sn co c ternary tube in tube composites for high capacity and long life lithium storage
    Advanced Functional Materials, 2013
    Co-Authors: Yan Gu, Fendan Wu, Yong Wang
    Abstract:

    All high capacity Li-alloy anodes for Li-ion battery suffer from enormous volume expansion and extraction during the lithium-ion insertion and extraction process. A Sn-Co-CNT@CNT ternary tube-in-tube nanoStructure is prepared by an in situ template technique and shows Perfect Structure suitability to solve the critical volume change problem. The morphology, size, and quantity of the filled CNT-supported Sn-Co nanoparticles can be also tuned by adjusting the experimental conditions to achieve optimal electrochemical performances. The tube-in-tube product exhibits larger-than-theoretical reversible capacities of 890–811 mA h g−1 at 0.1C in 200 cycles and excellent rate capability and high-rate cycling stability. The excellent electrochemical performance is mainly attributed to the confined volume change in the nanotube cavities and ensured permanent electrical connectivity of the immobilized Sn-Co anodes.

Hongbo Zhang - One of the best experts on this subject based on the ideXlab platform.

  • conductive graphene fibers for wire shaped supercapacitors strengthened by unfunctionalized few walled carbon nanotubes
    ACS Nano, 2015
    Co-Authors: Pan Li, Jennifer W Sedloff, Xiao Zhang, Hongbo Zhang
    Abstract:

    Graphene fibers are a promising electrode material for wire-shaped supercapacitors (WSSs) that can be woven into textiles for future wearable electronics. However, the main concern is their high linear resistance, which could be effectively decreased by the addition of highly conductive carbon nanotubes (CNTs). During the incorporation process, CNTs are typically preoxidized by acids or dispersed by surfactants, which deteriorates their electrical and mechanical properties. Herein, unfunctionalized few-walled carbon nanotubes (FWNTs) were directly dispersed in graphene oxide (GO) without preoxidation or surfactants, allowing them to maintain their high conductivity and Perfect Structure, and then used to prepare CNT-reduced GO (RGO) composite fibers by wet-spinning followed by reduction. The pristine FWNTs increased the stress strength of the parent RGO fibers from 193.3 to 385.7 MPa and conductivity from 53.3 to 210.7 S cm–1. The wire-shaped supercapacitors (WSSs) assembled based on these CNT-RGO fibers ...

Daniel Wichs - One of the best experts on this subject based on the ideXlab platform.

  • Perfect Structure on the edge of chaos
    Theory of Cryptography Conference, 2016
    Co-Authors: Nir Bitansky, Omer Paneth, Daniel Wichs
    Abstract:

    We construct trapdoor permutations based on sub-exponential indistinguishability obfuscation and one-way functions, thereby providing the first candidate that is not based on the hardness of factoring. Our construction shows that even highly Structured primitives, such as trapdoor permutations, can be potentially based on hardness assumptions with noisy Structures such as those used in candidate constructions of indistinguishability obfuscation. It also suggest a possible way to construct trapdoor permutations that resist quantum attacks, and that their hardness may be based on problems outside the complexity class $$\text{ SZK } $$ i¾?-- indeed, while factoring-based candidates do not possess such security, future constructions of indistinguishability obfuscation might. As a corollary, we eliminate the need to assume trapdoor permutations and injective one-way function in many recent constructions based on indistinguishability obfuscation.

  • TCC (A1) - Perfect Structure on the Edge of Chaos
    Theory of Cryptography, 2015
    Co-Authors: Nir Bitansky, Omer Paneth, Daniel Wichs
    Abstract:

    We construct trapdoor permutations based on sub-exponential indistinguishability obfuscation and one-way functions, thereby providing the first candidate that is not based on the hardness of factoring. Our construction shows that even highly Structured primitives, such as trapdoor permutations, can be potentially based on hardness assumptions with noisy Structures such as those used in candidate constructions of indistinguishability obfuscation. It also suggest a possible way to construct trapdoor permutations that resist quantum attacks, and that their hardness may be based on problems outside the complexity class $$\text{ SZK } $$ i¾?-- indeed, while factoring-based candidates do not possess such security, future constructions of indistinguishability obfuscation might. As a corollary, we eliminate the need to assume trapdoor permutations and injective one-way function in many recent constructions based on indistinguishability obfuscation.