A5028227545- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Recycling and Waste Management Techniques
- MXene and MAX Phase Materials
- Electrocatalysts for Energy Conversion
- Graphene research and applications
- Conducting polymers and applications
- Inorganic Chemistry and Materials
- Perovskite Materials and Applications
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Advanced Memory and Neural Computing
- 2D Materials and Applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Thermal Expansion and Ionic Conductivity
- Thermal Radiation and Cooling Technologies
- Polyoxometalates: Synthesis and Applications
- Electron and X-Ray Spectroscopy Techniques
- Semiconductor materials and interfaces
- Electric Vehicles and Infrastructure
Tsinghua University
2019-2025
Tsinghua–Berkeley Shenzhen Institute
2019-2025
University Town of Shenzhen
2024
Harbin University of Commerce
2021-2023
Stanford University
2015-2022
Chinese Academy of Sciences
2010-2021
Materials Science & Engineering
2020
SLAC National Accelerator Laboratory
2019
Stanford Medicine
2017-2018
Institute of Metal Research
2016-2017
We report a facile strategy to synthesize the nanocomposite of Co(3)O(4) nanoparticles anchored on conducting graphene as an advanced anode material for high-performance lithium-ion batteries. The obtained are 10-30 nm in size and homogeneously anchor sheets spacers keep neighboring separated. This Co(3)O(4)/graphene displays superior Li-battery performance with large reversible capacity, excellent cyclic performance, good rate capability, highlighting importance anchoring maximum...
A well-organized flexible interleaved composite of graphene nanosheets (GNSs) decorated with Fe3O4 particles was synthesized through in situ reduction iron hydroxide between GNSs. The GNS/Fe3O4 shows a reversible specific capacity approaching 1026 mA h g−1 after 30 cycles at 35 and 580 mAh 100 700 g−1as well as improved cyclic stability excellent rate capability. multifunctional features the are considered follows: (i) GNSs play "flexible confinement" function to enwrap particles, which can...
With the advent of flexible electronics, lithium-ion batteries have attracted great attention as a promising power source in emerging field and wearable electronic devices such roll-up displays, touch screens, conformable active radio-frequency identification tags, sensors implantable medical devices. In this review, we summarize recent research progress batteries, with special emphasis on electrode material selectivity battery structural design. We begin brief introduction current...
Abstract Lithium–sulfur batteries have attracted attention due to their six-fold specific energy compared with conventional lithium-ion batteries. Dissolution of lithium polysulfides, volume expansion sulfur and uncontrollable deposition sulfide are three the main challenges for this technology. State-of-the-art cathodes based on metal-oxide nanostructures can suppress shuttle-effect enable controlled deposition. However, a clear mechanistic understanding corresponding selection criteria...
Hydrous ruthenium oxide (RuO2)/graphene sheet composites (ROGSCs) with different loadings of Ru are prepared by combining sol–gel and low-temperature annealing processes. The graphene sheets (GSs) well-separated fine RuO2 particles (5–20 nm) and, simultaneously, the anchored richly oxygen-containing functional groups reduced, chemically exfoliated GSs onto their surface. Benefits from combined advantages in such a unique structure that ROGSC-based supercapacitors exhibit high specific...
Significance A series of metal sulfides were systematically investigated as polar hosts to reveal the key parameters correlated energy barriers and polysulfide adsorption capability in Li−S batteries. The investigation demonstrates that catalyzing oxidation is critical reducing barrier contributing remarkably improved battery performance. Density functional theory simulation allows us identify mechanism for how binding polysulfides trapping dominate Li 2 S decomposition process overall...
Graphene has been widely used to dramatically improve the capacity, rate capability, and cycling performance of nearly any electrode material for batteries. However, binding between graphene these materials not clearly elucidated. Here we report oxygen bridges with functional groups NiO from analysis by X-ray photoelectron spectroscopy, Fourier transform infrared Raman spectroscopy confirm conformation first-principles calculations. We found that nanosheets (NiO NSs) are bonded strongly...
Abstract Lithium–sulphur batteries with a high theoretical energy density are regarded as promising storage devices for electric vehicles and large-scale electricity storage. However, the low active material utilization, sulphur loading poor cycling stability restrict their practical applications. Herein, we present an effective strategy to obtain Li/polysulphide high-energy long-cyclic life using three-dimensional nitrogen/sulphur codoped graphene sponge electrodes. The electrode provides...
A unique sandwich structure is designed with pure sulfur between two graphene membranes, which are continuously produced over a large area, as very simple but effective approach for the fabrication of Li–S batteries ultrafast charge/discharge rates and long lifetimes.
Twinborn TiO<sub>2</sub>–TiN heterostructures enable smooth trapping–diffusion–conversion of polysulfides and produce ultralong life lithium–sulfur batteries.
We review the development of carbon–sulfur composites and application for Li–S batteries. Discussions are devoted to synthesis approach various composites, structural transformation sulfur, interaction impacts on electrochemical performances. Perspectives summarized regarding chemistry, electrochemistry industrial production with particular emphasis optimization composites.
Graphene-sulfur (G-S) hybrid materials with sulfur nanocrystals anchored on interconnected fibrous graphene are obtained by a facile one-pot strategy using sulfur/carbon disulfide/alcohol mixed solution. The reduction of oxide and the formation/binding were integrated. G-S hybrids exhibit highly porous network structure constructed graphene, many electrically conducting pathways, easily tunable content, which can be cut pressed into pellets to directly used as lithium-sulfur battery cathodes...
A flexible Li–S battery based on an integrated structure of sulfur and graphene a separator is developed. The internal current collector offers continuous conductive pathway, modified interface with sulfur, good barrier to effective reservoir for dissolved polysulfides, consequently improving the capacity cyclic life battery. As service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized online delivery,...
Abstract The detrimental shuttle effect in lithium–sulfur batteries mainly results from the mobility of soluble polysulfide intermediates and their sluggish conversion kinetics. Herein, presented is a multifunctional catalyst with merits strong polysulfides adsorption ability, superior activity, high specific surface area, electron conductivity by situ crafting TiO 2 ‐MXene (Ti 3 C T x ) heterostructures. uniformly distributed on MXene sheets act as capturing centers to immobilize...
We report the template-directed synthesis of sulphur–carbon nanotubes and their use to form a membrane that is binder-free, highly conductive flexible. This nanostructured used as self-supporting cathode without metal current-collectors for Li-S batteries. The has high electrical conductivity renders long life sulphur over 100 charge–discharge cycles. High discharge capacity was attained at 712 mA h gsulphur−1 (23 wt% S) 520 (50 current density (6 A gsulphur−1). overall flexible...
Lithium-sulfur (Li-S) batteries are promising next-generation energy storage technologies due to their high theoretical density, environmental friendliness, and low cost. However, conductivity of sulfur species, dissolution polysulfides, poor conversion from reduction, lithium sulfide (Li2S) oxidation reactions during discharge-charge processes hinder practical applications. Herein, under the guidance density functional theory calculations, we have successfully synthesized large-scale single...
A bifunctional separator modified by black-phosphorus nanoflakes is prepared to overcome the challenges associated with polysulfide diffusion in lithium–sulfur batteries. It brings benefits of entrapment various sulfur species via strong binding energy and re-activation trapped due its high electron conductivity as well Li-ion diffusivity. As a service our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized for...
Batteries with high energy and power densities along long cycle life acceptable safety at an affordable cost are critical for large‐scale applications such as electric vehicles smart grids, but is challenging. Lithium–sulfur (Li‐S) batteries attractive in this regard due to their density the abundance of sulfur, several hurdles poor inferior sulfur utilization need be overcome them commercially viable. Li–S cells capacity a dual‐confined flexible cathode configuration by encapsulating...
Full-cell cycling of a high density silicon-majority anode with 2× volumetric capacity graphite and stabilized coulombic efficiency exceeding 99.9%.
Significant increases in the energy density of batteries must be achieved by exploring new materials and cell configurations. Lithium metal lithiated silicon are two promising high-capacity anode materials. Unfortunately, both these anodes require a reliable passivating layer to survive serious environmental corrosion during handling cycling. Here we developed surface fluorination process form homogeneous dense LiF coating on reactive materials, with situ generated fluorine gas, using...