Excellent Li/Garnet Interface Wettability Achieved by Porous Hard Carbon Layer for Solid State Li Metal Battery

Small ◽  
2021 ◽  
pp. 2106142
Author(s):  
Linhui Chen ◽  
Jian Zhang ◽  
Rong‐Ao Tong ◽  
Jingxi Zhang ◽  
Hailong Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Carbon Layer ◽  
Hard Carbon

scholarly journals Combination of solid state NMR and DFT calculation to elucidate the state of sodium in hard carbon electrodes

2016 ◽  
Vol 4 (34) ◽  
pp. 13183-13193 ◽  
Author(s):  
Ryohei Morita ◽  
Kazuma Gotoh ◽  
Mika Fukunishi ◽  
Kei Kubota ◽  
Shinichi Komaba ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Dft Calculation ◽  
Magic Angle Spinning ◽  
The State ◽  
Mas Nmr ◽  
Magic Angle ◽  
Multiple Quantum ◽  
Hard Carbon ◽  
Angle Spinning

We examined the state of sodium electrochemically inserted in HC prepared at 700–2000 °C using solid state Na magic angle spinning (MAS) NMR and multiple quantum (MQ) MAS NMR.

scholarly journals Resistive-pulse and rectification sensing with glass and carbon nanopipettes

2017 ◽  
Vol 473 (2199) ◽  
pp. 20160931 ◽  
Author(s):  
Yixian Wang ◽  
Dengchao Wang ◽  
Michael V. Mirkin
Keyword(s):  
Solid State ◽  
Carbon Layer ◽  
Fine Tuning ◽  
Physical Size ◽  
Resistive Pulse ◽  
Thin Carbon ◽  
Local Measurements ◽  
Electroactive Species ◽  
Current Rectification ◽  
Resistive Pulse Sensing

Along with more prevalent solid-state nanopores, glass or quartz nanopipettes have found applications in resistive-pulse and rectification sensing. Their advantages include the ease of fabrication, small physical size and needle-like geometry, rendering them useful for local measurements in small spaces and delivery of nanoparticles/biomolecules. Carbon nanopipettes fabricated by depositing a thin carbon layer on the inner wall of a quartz pipette provide additional means for detecting electroactive species and fine-tuning the current rectification properties. In this paper, we discuss the fundamentals of resistive-pulse sensing with nanopipettes and our recent studies of current rectification in carbon pipettes.

scholarly journals Urchin-like NiCoP coated with a carbon layer as a high-performance electrode for all-solid-state asymmetric supercapacitors

2020 ◽  
Vol 1 (3) ◽  
pp. 481-494 ◽  
Author(s):  
Jingzhou Ling ◽  
Hanbo Zou ◽  
Wei Yang ◽  
Shengzhou Chen
Keyword(s):  
Solid State ◽  
High Performance ◽  
Specific Capacity ◽  
Physical Structure ◽  
Carbon Layer ◽  
Cycling Stability ◽  
High Conductivity ◽  
Asymmetric Supercapacitors ◽  
High Specific Capacity ◽  
Excellent Cycling Stability

The NiCoP@C-ULAs composite with high conductivity, abundant pores and good physical structure shows high specific capacity and excellent cycling stability.

Hard Carbon Anode with a Sodium Carborane Electrolyte for Fast-Charging All-Solid-State Sodium-Ion Batteries

2021 ◽  
pp. 145-149
Author(s):  
Keita Niitani ◽  
Shin Ushiroda ◽  
Hiroko Kuwata ◽  
Hiroko N. Ohata ◽  
Yusuke Shimo ◽  
...  
Keyword(s):  
Solid State ◽  
Sodium Ion ◽  
Carbon Anode ◽  
Sodium Ion Batteries ◽  
Hard Carbon ◽  
Fast Charging

A Study on Properties and Kinetics of Carburizing Superplastic Duplex Stainless Steel

2006 ◽  
Vol 326-328 ◽  
pp. 1677-1680 ◽  
Author(s):  
Nik Rozlin Nik Masdek ◽  
Iswadi Jauhari ◽  
Raden Dadan Ramdan ◽  
Rafidah Hasan
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Carbon Diffusion ◽  
Carbon Layer ◽  
Case Depth ◽  
Hard Carbon ◽  
Metallographic Technique ◽  
New Type ◽  
Kinetics Of ◽  
Carburizing Process

In this study, a new type of surface carburizing process was introduced using superplastic duplex stainless steel (DSS). The superplastic DSS was carburized at temperatures ranging from 1123 K to 1223 K for various durations. Initial pressures of 25 MPa, 49 MPa and 74 MPa were applied to give the superplastic deformation effect on the carburized specimens. SEM studies revealed a thick, uniform, smooth and dense hard carbon layer was formed on the surface of the superplastic DSS. By using metallographic technique and SEM, the resulting case depth of carbon layer was between 15 /m to 76 /m. The kinetics of this process in terms of carbon diffusion and its variation with processing time and temperature was determined using Arrhenius equation. Activation energy (Q) was determined as 152 kJ/mol.

scholarly journals High stability gel electrolytes for long life lithium ion solid state supercapacitor

2021 ◽  
Vol 257 ◽  
pp. 01084
Author(s):  
Zhi Chen ◽  
Junxiang Li ◽  
Mengqiang Wu ◽  
Jiaxuan Liao
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Polyvinylidene Fluoride ◽  
Lithium Ion ◽  
Maximum Energy ◽  
Liquid Electrolyte ◽  
Hard Carbon ◽  
Gel Electrolytes ◽  
Lithium Ion Capacitor ◽  
Safety And Stability

Lithium ion capacitors with liquid electrolyte are prone to leakage, combustion, explosion and other dangerous accidents. To solve these problems, the solid gel separator prepared by polyvinylidene fluoride - six fluoropropene (PVDF-HFP) is used in this work to improve the safety and stability of lithium ion supercapacitors. The PVDF-HFP based gel separator was used to replace the commercial separator and electrolyte in the lithium ion capacitor. The solid-state lithium ion supercapacitor was matched with porous carbon (PC) and hard carbon (HC). The maximum energy density of the device is 148.76 wh/kg, even at the power density of 33.6 kW/kg, which still retains 20.6 wh/kg. In addition, 83.3% capacity of solid-state lithium-ion supercapacitor is retained after 8000 times of charge and discharge. The requirements of high power energy density, high cycle stability and high safety are realized.

scholarly journals Mechanisms for overcharging of carbon electrodes in lithium-ion/sodium-ion batteries analysed by operando solid-state NMR

2020 ◽  
Vol 8 (29) ◽  
pp. 14472-14481
Author(s):  
Kazuma Gotoh ◽  
Tomu Yamakami ◽  
Ishin Nishimura ◽  
Hina Kometani ◽  
Hideka Ando ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Lithium Ion ◽  
Sodium Ion ◽  
Carbon Electrodes ◽  
Sodium Ion Batteries ◽  
Hard Carbon

An in-depth investigation of the overlithiation/oversodiation and subsequent delithiation/desodiation of graphite and hard carbon electrodes in the first cycle was conducted using operando7Li/23Na solid-state NMR.

The Effects of Carbon Coating on the Structure and Electrical Conductivity of LiFeSi0.03P0.97O4/ c Cathode Material via Solid State Process

2021 ◽  
Vol 1028 ◽  
pp. 179-184
Author(s):  
Pelangi Az-Zahra ◽  
Mochamad Zainuri ◽  
Hafizhah Ellora Della ◽  
May Shela Widya Putri ◽  
Bintoro Anang Subagyo
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Solid State ◽  
Carbon Content ◽  
Carbon Coating ◽  
Electronic Conductivity ◽  
Carbon Layer ◽  
X Ray ◽  
State Process ◽  
Lcr Meter

The synthesis of LiFeSi0.03P0.97O4/C (LFSP/C) composites have been done by solid state method. This study investigates the effects of carbon coating on the structure, microstructure and electrical conductivity of LFSP/C cathode materials. The carbon coating on Lithium Ferro Phosphate (LFP) plays a crucial role in determining its electrical conductivity. The variation of carbon content is 0wt.%; 6wt.%; 7wt.%; 8wt.% (LFP-0%, LFP-6%, LFP-7% and LFP-8%). The characterization was performed using X-Ray Diffraction (XRD), Scanning Electron Microscopy - Energy Dispersive X-ray (SEM-EDX), HighResolution-Transmission Electron Microscopy (HR-TEM) and LCR Meter tests. The XRD result have shown single-phase olivine (LiFePO4) in all samples. The analysis microstructure using SEM have shown increasing carbon content can reduce agglomeration. The particles size of LFSP is 845.570 nm, and after coating carbon the particles size decreased up to 457.191 nm. The EDX results showed that the amount of atomic percentage for carbon tends to increase as the amount of carbon content increased. HR-TEM images indicates that the formation of carbon layer have formed, but not perfectly coat the LFP particle. The average carbon layer size is 78,31 nm with the size of LFSP particle is 352.82 nm. The LCR Meter result showed that LFP-7% had the largest electronic conductivity (2,275x10-7 S/cm). The carbon coating led to significant enhancement in electronic conductivity from ~10-9-10-10 S/cm to ~10-7 S/cm.

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