The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Ru-shi Liu - One of the best experts on this subject based on the ideXlab platform.
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Recent Advancements in Li-Ion Conductors for All-Solid-State Li-Ion Batteries
ACS Energy Letters, 2017Co-Authors: Yedukondalu Meesala, Anirudha Jena, Ho Chang, Ru-shi LiuAbstract:Inorganic solid lithium ion Conductors are potential candidates as replacement for conventional organic electrolytes for safety concerns. However, achieving a Li-ion conductivity comparable to that in existing liquid electrolytes (>1 mS cm–1) remains a challenge in solid-state electrolytes. One of the approaches for achieving a desirable conductivity is doping of various elements into the lattice framework. Our discussion on the structure and conductivity of crystalline Li-ion Conductors includes description of NAtrium Super Ionic CONductor (NASICON)-type Conductors, garnet-type Conductors, perovskite-type Conductors, and Lithium Super Ionic CONductor (LISICON)-type Conductors. Moreover, we discuss various strategies currently used to enhance ionic conductivity, including theoretical approaches, ultimately optimizing the electrolyte/electrode interface and improving cell performance.
Shaibal K. Sarkar - One of the best experts on this subject based on the ideXlab platform.
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Inorganic hole conducting layers for perovskite-based solar cells
Journal of Physical Chemistry Letters, 2014Co-Authors: Anand S Subbiah, Neha Mahuli, Ansuman Halder, Soham Ghosh, Gary Hodes, Shaibal K. SarkarAbstract:Hybrid organic–inorganic semiconducting perovskite photovoltaic cells are usually coupled with organic hole Conductors. Here, we report planar, inverse CH3NH3PbI3–xClx-based cells with inorganic hole Conductors. Using electrodeposited NiO as hole conductor, we have achieved a power conversion efficiency of 7.3%. The maximum VOC obtained was 935 mV with an average VOC value being 785 mV. Preliminary results for similar cells using electrodeposited CuSCN as hole conductor resulted in devices up to 3.8% in efficiency. The ability to obtain promising cells using NiO and CuSCN expands the presently rather limited range of available hole Conductors for perovskite cells.
Yedukondalu Meesala - One of the best experts on this subject based on the ideXlab platform.
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Recent Advancements in Li-Ion Conductors for All-Solid-State Li-Ion Batteries
ACS Energy Letters, 2017Co-Authors: Yedukondalu Meesala, Anirudha Jena, Ho Chang, Ru-shi LiuAbstract:Inorganic solid lithium ion Conductors are potential candidates as replacement for conventional organic electrolytes for safety concerns. However, achieving a Li-ion conductivity comparable to that in existing liquid electrolytes (>1 mS cm–1) remains a challenge in solid-state electrolytes. One of the approaches for achieving a desirable conductivity is doping of various elements into the lattice framework. Our discussion on the structure and conductivity of crystalline Li-ion Conductors includes description of NAtrium Super Ionic CONductor (NASICON)-type Conductors, garnet-type Conductors, perovskite-type Conductors, and Lithium Super Ionic CONductor (LISICON)-type Conductors. Moreover, we discuss various strategies currently used to enhance ionic conductivity, including theoretical approaches, ultimately optimizing the electrolyte/electrode interface and improving cell performance.
S-h Park - One of the best experts on this subject based on the ideXlab platform.
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Overview of verification tests on AC loss, contact resistance and mechanical properties of ITER Conductors with transverse loading up to 30 000 cycles
Superconductor Science and Technology, 2019Co-Authors: K A Yagotintsev, Denis Bessette, A. Devred, W.a.j. Wessel, A. Vostner, Neil Mitchell, Y. Nabara, T. Boutboul, V. Tronza, S-h ParkAbstract:The ITER magnet system uses cable-in-conduit conductor (CICC) technology with individual strands twisted in several stages resulting in a rope-type cable, which is inserted into a stainless steel conduit. The combination of high current (up to 68 kA) and background magnetic field (up to 13 T) results in large transverse Lorentz forces exerted on the Conductors during magnet system operation. The high transverse forces, accompanied with the cyclic nature of the load, have a strong influence on the conductor properties. The Twente Cryogenic Cable Press is used to simulate the effect of the Lorentz forces on a conductor comparable to the ITER magnet operating conditions. An overview is presented of the AC coupling and hysteresis loss, mechanical deformation characteristics and inter-strand contact resistance measurement results obtained on full-size ITER CICCs measured in the Twente Cryogenic Cable Press. The aim of this work is to characterize Conductors' electromagnetic and mechanical properties during cycling of the load up to 30 000 cycles. The evolution of the magnetization (AC coupling loss time constant nτ), mechanical properties and inter-strand resistance R c between selected strands is presented along with loading history. The R c between first triplet strands is also measured as a function of applied load. It is shown that transverse load cycling has a strong influence on the CICC properties. An overview of the results for eight toroidal field Conductors, two central solenoid Conductors, three poloidal field Conductors of different types (PF1&6, PF4, PF5), one main bus-bar and one correction coil conductor is presented.
Joaquim Anacleto - One of the best experts on this subject based on the ideXlab platform.
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magnetic field generated by the flow of ac current through finite length nonmagnetic Conductors cylinders tubes coaxial cables
Electrical Engineering, 2018Co-Authors: J M Ferreira, Joaquim AnacletoAbstract:Simple expressions for the magnetic field generated by the flow of low-frequency AC current through nonmagnetic Conductors (defined as having relative permeability around 1) are determined in the realistic setting where such Conductors are of finite length, for the following three cases: solid cylinder, tubular conductor, coaxial cable. The solutions obtained here are applied to the limiting situations of the negligible radius finite cylinder (i.e. filamentary wire segment), the infinitely long cylinder, the negligible thickness tubular conductor, the tubular conductor of finite thickness but infinite length and/or radii and the infinitely long coaxial cable, and compared against the familiar expressions available in the literature for such cases. It is hoped that the simplicity of the magnetic field expressions given here for finite length cylindrically symmetric Conductors will stimulate their application wherever it may not be possible or desirable to use the infinite length approximation.