Abstract
Transition metal oxides as anode materials have received extensive research owing to the high specific capacity. However, the rapid decline of battery capacity caused by volume expansion and low electrical conductivity hinders the practical application of transition metal oxides. This study reported a pseudo-capacitance material polypyrrole-coated Fe2O3/Mn2O3 composites material as a high stability anode for lithium-ion batteries. The polypyrrole coating layer can not only serve as a conductive network to improve electrode conductivity but also can be used as a protective buffer layer to suppress the volume change of Fe2O3/Mn2O3 during the charging and discharging process. At the same time, the porous structure of Fe2O3/Mn2O3 composite can not only provide more active sites for lithium storage but also play a certain buffer effect on the volume change of the material. Polypyrrole-coated Fe2O3/Mn2O3 composite as the anode for lithium-ion batteries shows great electrochemical storage performance, with high specific capacity (627 mAh g−1 at a current density of 1 A g−1), great cycle stability (the capacity not shows obvious signs of attenuation after 500 cycles), and rate performance (432 mAh g−1 at a current density of 2.0 A g−1).
Highlights
IntroductionLithium-ion batteries (LIBs) have become the primary electrochemical energy storage devices due to high energy density and excellent cycling stability
Yuan Fang Shaanxi University of Science and Technology Xi\'an Campus: Shaanxi University of Science and Technology Tengfei Li
This study reported a pseudo-capacitance material polypyrrole coated Fe2O3/Mn2O3 composites material as a high stability anode for lithium-ion batteries
Summary
Lithium-ion batteries (LIBs) have become the primary electrochemical energy storage devices due to high energy density and excellent cycling stability. Polypyrrole (PPy), as a pseudo-capacitance material for supercapacitors, has the advantages of high conductivity, good flexibility, simple production, and low price This pseudo-capacitance material can store charge on the electrode material surface, so compared with batteries, the electrode is less degraded and has better cycle stability. Introducing it into the transition metal oxide anode material can effectively improve its electrochemical stability[14, 15]. MnSO4·H2O, Fe (NO3)3·9H2O, urea, ammonium sulfate, P-toluene sulfonic acid, and pyrrole were bought from Sinopharm Chemical Reagent Co., Ltd. Polyvinylidene fluoride, acetylene black, and N-methyl pyrrolidone was provided by Tianjin Comio Chemical Reagent Co., Ltd. 2.1.1 The synthesis of Fe2O3/Mn2O3 composites. The galvanostatic charge-discharge performance and rate performance of the battery were tested on NEWARE test equipment (CT-4008T)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Materials Science: Materials in Electronics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
