Effect of surfactants on the electrochemical behavior of LiFePO4 cathode material for lithium ion batteries

Nitrogen-doped graphene guided formation of monodisperse microspheres of LiFePO4 nanoplates as the positive electrode material of lithium-ion batteries

“…The bands observed at 1337 and 1600 cm -1 are respectively attributed to the D band and G band, where G band is ascribed to the vibration mode of graphitic carbon and D band is due to the disorders or defects in carbon. 3,13,28 The intensity ratio of D band and G band (I D /I G ) stands for the degree of surface disorder of carbon materials. 3,28 The I D /I G values of LFP/G and LFP/NG are calculated to be 1.19 and 1.21, respectively.…”

“…3,13,28 The intensity ratio of D band and G band (I D /I G ) stands for the degree of surface disorder of carbon materials. 3,28 The I D /I G values of LFP/G and LFP/NG are calculated to be 1.19 and 1.21, respectively. LFP/NG shows higher I D /I G value than LFP/G, suggesting that more structural defects have been introduced after N-doping, which is consistent with the previously reported N-doped graphene.…”

Enhanced electrochemical properties of LiMnPO4/C composites by tailoring polydopamine-derived carbon coating

“…The other two Gaussian bands were assigned to sp 3 type carbon which were often observed in amorphous carbonaceous compounds [27]. The integrated Raman intensity ratio of D/G bands (ID/IG) or the total intensity associated with sp 3 to sp 2 type carbon vibrations (Isp3/Isp2) was often used to determine the structure of carbon on the surface of olivine-type materials, with smaller ratio being associated with more conductive structure [26][27][28][29]. In the present work, the ID/IG and Isp3/Isp2 ratios of the obtained LMP/C samples are in the range of 1.98-2.29 and 0.29-0.40, respectively, but both of the above two parameters irregularly change with various samples, making it unable to compare the carbon structure and thus the electronic conductivity of carbon based on these data.…”

Scalable Preparation of LiFePO4/C Nanocomposites with sp2‐Coordinated Carbon Coating as High‐Performance Cathode Materials for Lithium‐Ion Batteries

“…The Brunauer–Emmett–Teller (BET) surface area was calculated to be around 10.6 m 2 g −1 . In summary, the structural, morphological, and carbon quality outcomes are competitive compared with previously reported LiFePO 4 composites that used much more expensive and more complex methods …”