Tri-phase (1-x-y) Li2FeSiO4·xLiFeBO3·yLiFePO4 nested nanostructure with enhanced Li-storage properties

Tian, Meiyue; Hu, Lin; Huang, Zhe; Li, Mingrui; Yang, Jinlong; Wang, Zhe; Li, Jiannian; Lin, Xin

doi:10.1016/j.cej.2018.10.059

Cited by 16 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This difference implies that LFBI/C is characterized by superior reversibility with respect to LFB/C 44 . This result demonstrates that the partial doping of oxygen atoms with iodine atoms increases the specific capacity of LFB/C and the kinetics of lithium‐ion diffusion, 47 as also indicated by the data reported in Figure 5b. Doping LFB with a small amount of iodine at the borate unit resulted in LFBI/C achieving a higher initial capacity than LFB/C (116.19 mAh g −1 vs. 106.67 mAh g −1 ).…”

Section: Resultssupporting

confidence: 63%

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO₃ as a cathode material for lithium‐ion batteries

Jeong

Kumar

Lee

2022

Bulletin Korean Chem Soc

View full text Add to dashboard Cite

In this study, monoclinic LiFeBO 3 was carbon-coated and iodine doped via a solid-state reaction to improve the electrochemical performance of pristine LiFeBO 3 as cathode material in lithium-ion batteries. In order to enhance the electrical conductivity of LiFeBO 3 , the highly electronegative iodide anion was doped in a limited amount (x = 0.005) at the oxygen site of the borate to produce LiFeBO 3Àx I 2x . A thin carbon layer was then deposited in situ on the LiFe-BO 2.995 I 0.01 particles (to produce "LFBI/C") to protect them from air and moisture. Field-emission scanning electron microscopy (FE-SEM) data indicated the aggregated morphology of the synthesized samples. Powder X-ray diffraction (XRD) and 7 Li magic angle spinning (MAS) nuclear magnetic resonance (NMR) measurements revealed that both the doped and undoped LiFeBO 3based samples had mainly monoclinic structures, although a small amount of a vonsenite-type phase was formed upon iodine doping. X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX) data confirmed the successful insertion of iodine in the cathode material. The specific discharge capacity of LFBI/C at 0.05 C rate (144.68 mAh g À1 ) was higher than that of carbon-coated LiFeBO 3 (122.46 mAh g À1 ). The increased capacity of LFBI/C was also evident in long charge-discharge cycles conducted at 1 C rate and in the overall rate performance. Interestingly, the iodine-doped sample exhibited significantly high specific discharge capacity even at 10 C rate.

show abstract

Section: Resultssupporting

confidence: 63%

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO₃ as a cathode material for lithium‐ion batteries

Jeong

Kumar

Lee

2022

Bulletin Korean Chem Soc

View full text Add to dashboard Cite

show abstract

“…A new product can be made up of three materials as triple‐phase (1‐x‐y)16Li 2 FeSiO 4 ⋅xLiFeBO 3 ⋅yLiFePO 4 (denoted as (1‐x‐y)LFS⋅xLFB⋅yLFP) hybrid cathode [124] and the 0.92LFS ⋅ 0.04LFB ⋅ 0.04LFP composite showed a discharge capacity of 258 mAh g −1 at 0.1 C rate with high rate performance. A new approach has developed to design the Li 2 FeSiO 4 /C/Cu/Li 3 PO 4 composite cathodes as shown in Figure 5 (c and f).…”

Section: Silicates: An Alternative Viable Cathode?mentioning

confidence: 99%

A Critical Review on Electrochemical Properties and Significance of Orthosilicate‐Based Cathode Materials for Rechargeable Li/Na/Mg Batteries and Hybrid Supercapacitors

2021

View full text Add to dashboard Cite

The polyanion orthosilicates such as Li2XSiO4 (X=Fe, Mn, Co, Ni), Na2XSiO4 (X=Fe, Mn, Co, Ni) and MgXSiO4 (X=Fe, Mn, Co, Ni) have been considered as viable cathode materials for the Li/Na/Mg batteries and hybrid supercapacitors. Significant capacity fading, structural instability, and low conductivity are the major impediments in silicate‐based cathode materials, which limit their practical applicability and industrial implementation. Identifying the source of capacity fading in these compounds upon cycling would offer better insight which merely reporting in previous efforts. The primary aim of this systematic review is to provide a clear insight on structure, morphology, electrical and electrochemical advances, and major impediments in the Li2XSiO4, Na2XSiO4 and MgXSiO4 type electrode materials. This study also compared the electrochemical results of various orthosilicate materials and discussed the mechanism of structural fracture during cycling. Among the numerous silicates, Li2FeSiO4 and Li2MnSiO4 are considered as promising cathode materials for advanced LIBs. This review also offers future opportunities and possible solutions to the structural and electrochemical inhibitions in Li2XSiO4, Na2XSiO4 and MgXSiO4 based‐electrodes for the development of rechargeable Li/Na/Mg batteries and hybrid supercapacitors.

show abstract

“…1,2 However, considering its unsatisfactory theoretical specic capacity (i.e., 175 mA h g À1 ), similar orthosilicate-structured Li 2 FeSiO 4 (LFSO) has attracted considerable attention, owing to its high theoretical specic capacity (331 mA h g À1 ), good stability, low-cost, abundance on earth, and environmental friendliness. [3][4][5][6][7] In analogy with LiFePO 4 , Li 2 FeSiO 4 possesses the inherent weakness of low electronic and ionic conductivity, which encumbers its electrochemical performance signicantly. Furthermore, a clear understanding of the structural stability with extraction of two Li + ions from the orthosilicate structure remains a huge challenge.…”

Section: Introductionmentioning

confidence: 99%

Approaching theoretical specific capacity of iron-rich lithium iron silicate using graphene-incorporation and fluorine-doping

Liu

et al. 2022

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

Tri-phase (1-x-y) Li2FeSiO4·xLiFeBO3·yLiFePO4 nested nanostructure with enhanced Li-storage properties

Cited by 16 publications

References 44 publications

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO₃ as a cathode material for lithium‐ion batteries

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO₃ as a cathode material for lithium‐ion batteries

A Critical Review on Electrochemical Properties and Significance of Orthosilicate‐Based Cathode Materials for Rechargeable Li/Na/Mg Batteries and Hybrid Supercapacitors

Approaching theoretical specific capacity of iron-rich lithium iron silicate using graphene-incorporation and fluorine-doping

Contact Info

Product

Resources

About

Tri-phase (1-x-y) Li2FeSiO4·xLiFeBO3·yLiFePO4 nested nanostructure with enhanced Li-storage properties

Cited by 16 publications

References 44 publications

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO3 as a cathode material for lithium‐ion batteries

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO3 as a cathode material for lithium‐ion batteries

A Critical Review on Electrochemical Properties and Significance of Orthosilicate‐Based Cathode Materials for Rechargeable Li/Na/Mg Batteries and Hybrid Supercapacitors

Approaching theoretical specific capacity of iron-rich lithium iron silicate using graphene-incorporation and fluorine-doping

Contact Info

Product

Resources

About

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO₃ as a cathode material for lithium‐ion batteries

Electrochemical and spectroscopic studies on carbon‐coated and iodine‐doped LiFeBO₃ as a cathode material for lithium‐ion batteries