【摘 要】
：
The main challenges in development of traditional liquid lithium-sulfur batteries are the shuttle effect at the cathode caused by the polysulfide and the safety concern at the Li metal anode arose from the dendrite formation.All-solid-state lithium-sulfur
【机 构】
：
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201
论文部分内容阅读
The main challenges in development of traditional liquid lithium-sulfur batteries are the shuttle effect at the cathode caused by the polysulfide and the safety concern at the Li metal anode arose from the dendrite formation.All-solid-state lithium-sulfur batteries have been proposed to solve the shuttle effect and prevent short circuits.However,solid-solid contacts between the electrodes and the electrolyte increase the interface resistance and stress/strain,which could result in the limited electrochemical performances.In this work,the cathode of all-solid-state lithium-sulfur batteries is prepared by depositing sulfur on the surface of the carbon nanotubes (CNTs@S) and further mixing with Li1oGeP2S12 electrolyte and acetylene black agents.At 60 ℃,CNTs@S electrode exhibits superior electrochemical performance,delivering the reversible discharge capacities of 1193.3,959.5,813.1,569.6 and 395.5 mAh g-1 at the rate of 0.1,0.5,1,2 and 5 C,respectively.Moreover,the CNTs@S is able to demonstrate superior high-rate capability of 660.3 mAh g-1 and cycling stability of 400 cycles at a high rate of 1.0 C.Such uniform distribution of the CNTs,S and Li10GeP2S12 electrolyte increase the electronic and ionic conductivity between the cathode and the electrolyte hence improves the rate performance and capacity retention.
其他文献
The earth-abundant transition metal based nanomaterials are regarded as state-of-the-art oxygen evolution reaction (OER) electrocatalyst.Recent studies have shown that amorphous materials are more active than their crystalline forms.Herein,we demonstrate
In dual-ion batteries (DIBs),energy storage is achieved by intercalation/de-intercalation of both cations and anions.Due to the mismatch between ion diameter and layer space of active materials,however,volume expansion and exfoliation always occur for ele
Transition metal chalcogenides have nowadays garnered burgeoning interest owing to their fascinating electronic and catalytic properties,thus possessing great implications for energy conversion and storage applications.In this regard,their controllable sy
Lithium metal has been considered to be the most promising anode material for the new generation of energy-storage system.However,challenges still stand in protecting lithium metal from spontaneous reactions with electrolytes and preventing the dendritic
Ti-bearing slag (TiO2 ＞20 wt％) is a valuable titanium secondary resource.The extraction of titanium from the slag is difficult due to the complex composition and structure.Although molten oxide electrolysis is considered as a promising method,silicon will
This work presents an enhanced hydrometallurgical process for recycling lithium ion batteries.First,end-of-life batteries were processed in a physical pre-treatment plant to obtain a representative electrode material.The resulting leachate was purified fo
An optimized graphene/RuO2/S composite is prepared by hydrothermal growth of RuO2 particles on graphene oxide sheets as the positive electrode for rechargeable lithium-sulfur batteries.The electrode with 6.1 wt％ RuO2 nanocrystals and a high sulfur content
Developing bifunctional catalysts that increase both the OER and ORR kinetics and transport reactants with high efficiency is desirable.Herein,micro-meso-macroporous FeCo-N-C-X (denoted as “M-FeCo-N-C-X”,X represents Fe/Co molar ratio in bimetallic zeolit
The directly selective hydrogenolysis of xylitol to ethylene glycol (EG) and 1,2-propylene glycol (1,2-PDO) was performed on Cu–Ni–ZrO2 catalysts prepared by a co-precipitation method. Upon optimizing the reaction conditions (518 K, 4.0 Mpa H 2 and 3 h),
Porous carbon materials with developed porosity,high surface area and good thermal-and chemical-resistance are advantageous for gas adsorption and separation.However,most carbon adsorbents are in powder form which exhibit high pressure drop when deployed