A5002954688- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Graphene research and applications
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Advanced battery technologies research
- Ammonia Synthesis and Nitrogen Reduction
- MXene and MAX Phase Materials
Ningbo Institute of Industrial Technology
2017-2024
Chinese Academy of Sciences
2017-2024
University of Chinese Academy of Sciences
2017-2018
Materials Science & Engineering
2013
Electrochemical prelithiation is a facile, effective and extensively used method to improve the initial coulombic efficiency of SiO. However, much less research attention has been devoted effect on several cycles. Here, we introduce new perspective evaluate behaviors, which could understand in depth electrochemical behaviors their effects following two Then X-ray photoelectron spectroscopy was further performed pinpoint reaction products. It found that quantity irreversible Li4SiO4, Li2O SEI...
Silicon monoxide (SiO) is considered as one of the most promising anode material candidates for next-generation high-energy-density lithium ion batteries (LIBs) due to its high specific capacity and relatively lower volume expansion than that Si. However, a large number irreversible products are formed during first charging discharging process, resulting in low initial Coulombic efficiency (ICE) SiO. Herein, we report an economical convenient method increase ICE SiO without sacrificing by...
The Li2FeSiO4/C composites were prepared using iron starting materials of either insoluble ferrous (FeC2O4·2H2O) or soluble ferric (Fe(NO3)3·9H2O) compounds through sol-gel process and solid state reaction. pure monoclinic P21/n with the rough surface consisting a large amount open pores was obtained source, while sphere-like nanoparticles containing major impurities Fe3O4 (γ-Fe2O3) Li2SiO3 source. With less expensive nitrate faster heating rate, excellent diffusion coefficients 1.88 × 10−8...
Silicon monoxide (SiOx, x ∼ 1) has emerged as a highly promising candidate for high-energy-density lithium-ion batteries due to its high specific capacity and suitable working potential. Nevertheless, the formation of large quantity irreversible products, such Li2O lithium silicates, during initial lithiation process results in low coulombic efficiency (ICE) SiOx, which is significant impediment commercial application. To overcome this limitation, two aromatic complexes, namely,...
3D porous networks are subject to be destroyed during electrode preparation. Structure-preserved Si/rGO anode materials were synthesized by tuning pore size distribution and performed superior electrochemical properties.
The application of SiO anodes in Li-ion batteries is greatly restricted by its low initial coulombic efficiency (ICE). Usually, a pre-lithiation procedure necessary to improve the ICE, but available technologies are associated with safety issues. Metal (M)-mixed shows great promise address these issues reactivating Li2 O through reaction M+Li2 O→MOx +Li+ , which inverse that occurring at MOx anodes. Sn found be good choice metal for this concept. Nanoscale Sn-mixed composites prepared...
Abstract As a promising lithium‐ion battery anode materials, silicon suboxides (SiO x ) exhibit elusive microstructure with atomic‐scale disproportionation which reveals strong relation to performance. Generally, the structure of SiO could be tuned via high‐temperature treatment. In this work, disproportionated are prepared systematically discuss internal relationship among microstructure, physicochemical properties and electrochemical After annealing, amorphous 2 nanocrystalline Si appear,...
A one-step facile synthesis of pre-constructed two-layer conductive buffers for Al anodes with enhanced electrochemical performance in lithium-ion batteries.
Abstract Silicon anodes have been given great focus due to the unparalleled theoretical specific capacity. However, destructive volume expansion during lithiation/delithiation processes and intrinsic inferior electrical conductivity cause drastic capacity decay. Forming composites with conductive stretchable material is an effective solution address these problems. Here, a three‐dimensional continuous network consisting of one‐dimensional flexible graphene nanoscroll wrapped silicon...