Products

  • 0
  • 0

Advanced functional materials: improving the coulomb efficiency of potassium ion battery conversion reaction by limiting effect

With the application of lithium-ion batteries in large-scale energy storage

has attracted the attention of researchers. It is necessary to develop new energy storage system. Among many energy storage systems potassium ion battery is one of the ideal cidate systems for large-scale energy storage because of its abundant resources low price. Anode materials for high-capacity potassium ion batteries usually can hold one or more K but with a sharp volume expansion. This characteristic seriously threatens the stability of solid electrolyte mesophase (SEI) on the electrode surface resulting in low coulomb efficiency poor cycle stability.

are based on a series of work Thinking on the anode materials of potassium ion batteries. Jiao Lifang of Nankai University Dr. Cao kangzhe of Xinyang Normal University proposed to solve the above problems by inducing the rapid formation of stable SEI film through limiting effect. In combination with coaxial electrospinning in-situ vulcanization technology the researchers successfully dispersed cus Nb2O5 in the core shell of carbon nanofibers constructed core-shell structure cus-c @ nb2o5-c nanofibers (NFS). In this structure the shell can protect cus from direct contact with electrolyte effectively inhibit the volume expansion caused by structural reconstruction which is conducive to the rapid formation of stable SEI film. The results show that after 100 cycles the reversible capacity retention rate of cus-c @ nb2o5-c NFS electrode is 93.1% which is higher than that of cus-c NFS electrode (74.6%). Most importantly CuS-C@Nb2O5-C The cycle time of stable coulomb efficiency of more than 99.0% was shortened from 30 cycles of cus-c NFS electrode to 5 cycles. The advantages of conis2 conis2 are the same. Tracking the changes of the electrode structure SEI film it was found that the limiting effect promoted the rapid formation of stable SEI film effectively inhibited the volume expansion of active substances thus maintaining the stability of the electrode structure. Therefore the use of confinement can improve the coulomb efficiency cycle stability of the electrode which provides a new idea for the construction of high-performance electrode materials for potassium ion batteries.
MIS-ASIA is an online content marketing platform that has a large number of visitors worldwide. It is considered to be the leading IT, mechanical, chemical, and nanomaterial information distributor in the Asia-Pacific region. The MIS-ASIA website provides high-quality articles and news on digital information technology, mechanical technology, nanotechnology, biology and science for scientists, engineers and industry experts, machinery suppliers and buyers, chemical suppliers and laboratories. If you need advertising and posting service, or you need to start sponsorship, please contact us.

Inquery us

  • tags

Our Latest Products

High Purity Tin Sn Powder CAS 7440-31-5,99%

Recently, the Bulgarian Gas Company said that Bulgaria is negotiating with Gazprom on resuming natural gas supply, and there is a possibility that Russia will resume natural gas supply to Bulgaria.Since the outbreak of the conflict between Russia and…

High Purity Nano Ag Silver powder cas 7440-22-4, 99%

The secretary general of the Organization of Petroleum Exporting Countries (OPEC) said recently that US economic sanctions against Venezuela have affected global energy supplies. He told Venezuelan media that the ECONOMIC sanctions imposed by the Uni…

High Purity Tungsten Carbide WC Powder Cas 12070-12-1, 99%

A tanker carrying 650,000 barrels of Venezuelan crude oil is reportedly bound for Europe, the first time Venezuela has exported crude to Europe in the past two years under US sanctions. It is analyzed that the U.S. is making up for the European ener…