Study on synthesis of spinel LiNi0.5Mn1.5O4 cathode material and its electrochemical properties by two‐stage roasting. (17th January 2021)

• Record Type: Journal Article
• Authors: Chang, Longjiao; Cao, Shiyuan; Luo, Shaohua; Zhang, Fusheng; Li, Kun
• Other Names: Atabani Abdulaziz E. guestEditor.
• Is Part Of: International journal of energy research. Volume 45:Number 6(2021)
• Page Start: 8932
• Page End: 8941
• Publication Date: 2021-01-17
• Subjects: electrochemical performance -- LiNi0.5Mn1.5O4 -- lithium‐ion battery -- two‐stage roasting method; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.6426
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: LiNi0.5 Mn1.5 O4 (LNMO) cathode material is burnt in two‐stage roasting process for lithium battery. Carried out X‐ray diffraction (XRD), scanner transmission electron microscope (SEM), laser grain fineness distribution and precise measurement of photoelectric catalysis, and qualitatively analyzed the LNMO cathode material. The SEM image shows that the LNMO battery cathode material is combined with μm‐level particles (10 μm in diameter). The XRD pattern shows that the structure of the prepared LNMO cathode material belongs to the Fd3m space group. After being burned at 650°C for 8 hours and refrigerated milling, it is burned again at 1000°C for 8 hours. At this time, the LNMO cathode material prepared by quenching has the best photocatalytic properties. In the range of 3.5 to 5.1 V, the original charge‐discharge volume of the prepared battery cathode material is shown as 130.3 mAh g −1 at a speed of 1.0 C. After 100 cycles, the sample saves 96.7% (1.0 C) of the original volume. At 1025°C, at different speeds in the discontinuance voltage range of 3.5 to 5.1 V, the charge and discharge quantity of the negative electrode raw materials obtained by individuals can be maintained at about 133.6 (0.2 C), 129.9 (1.0 C), 129 (2.0 C), respectively. Abstract : LiNi0.5 Mn1.5 O4 (LNMO) cathode material are successfully synthesized by two‐stage roasting process for lithium‐ion battery. The material is initially reacted at a lower temperature for the first low‐temperature roasting, and the roasting temperature and time are reduced, the growth and agglomeration of LNMO particles are inhibited, and the electrochemical performance of the material is improved. Compared with the traditional process, the material multiplier performance prepared by the two‐stage roasting process is excellent.