Lithium Titanate‐Based Lithium‐Ion Batteries

Liu, Jiehua; Wei, Xiangfeng; Meng, Fancheng

doi:10.1002/9781119407713.ch2

Cited by 4 publications

(3 citation statements)

References 185 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results demonstrate how polydispersity and discontinuous phase transformations within TiO2 nanocrystal ensembles impact charging rates in electrodes at different states of charge. Titania and lithium titanate polymorphs, including spinel Li4Ti5O12, [23][24][25][26][27][28] anatase, [6][7][8][9][10][11][12] TiO2-B bronze [29][30][31][32][33] and amorphous phases, [34][35][36][37] are prototypical Li-ion anodes that charge through lithium insertion and surface reactions in nanostructured electrodes. In particular, anatase TiO2 has charge storage densities competitive with conventional graphite electrodes and a small volume change during Li-ion insertion that allows for high cycle and calendar lifetimes at fast charging rates.…”

Section: Introductionmentioning

confidence: 99%

“…Titania and lithium titanate polymorphs, including spinel Li 4 Ti 5 O 12 , − anatase, − TiO 2 –B bronze, − and amorphous phases, − are prototypical Li-ion anodes that charge through lithium insertion and surface reactions in nanostructured electrodes. In particular, anatase TiO 2 has charge storage densities competitive with conventional graphite electrodes and a small volume change during Li-ion insertion that allows for high cycle and calendar lifetimes at fast-charging rates. − However, the broad use of titanium oxide anodes is limited by their relatively high potentials (i.e., low specific energy), slow lithium diffusion, and low intrinsic electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of Lithium Insertion in Electrochromic Titanium Dioxide Nanocrystal Ensembles

et al. 2021

View full text Add to dashboard Cite

is a robust model anode for Li-insertion in batteries. The influence of nanocrystal size on the equilibrium potential and kinetics of Li-insertion is investigated with in operando spectroelectrochemistry of thin film electrodes. Distinct visible and infrared responses correlate with Li-insertion and electron accumulation, respectively, and these optical signals are used to deconvolute Li-insertion from other electrochemical responses, such as double-layer capacitance and electrolyte leakage.Electrochemical titration and phase-field simulations reveal that a difference in surface energies between anatase and lithiated phases of TiO 2 systematically tunes Li-insertion potentials with particle size. However, particle size does not affect the kinetics of Li-insertion in ensemble electrodes. Rather, Li-insertion rates depend on applied overpotential, electrolyte concentration, and initial state-of-charge. We conclude that Li diffusivity and phase propagation are not rate-limiting during Li-insertion in TiO 2 nanocrystals. Both of these processes occur rapidly once the transformation between the low-Li anatase and high-Li orthorhombic phases begins in a particle. Instead, discontinuous kinetics of Li accumulation in TiO 2 particles prior to the phase transformations limits (dis)charging rates. We demonstrate a practical means to deconvolute non-equilibrium charging behavior in nanocrystalline electrodes through a combination of colloidal synthesis, phase field simulations and spectroelectrochemistry. File list (2)download file view on ChemRxiv Manuscript_DynamicsofLithiumInsertion.pdf (2.46 MiB) download file view on ChemRxiv SupportingInfo_DynamicsofLithiumInsertion.pdf (3.34 MiB)

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics of Lithium Insertion in Electrochromic Titanium Dioxide Nanocrystal Ensembles

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Titania and lithium titanate polymorphs, including spinel Li4Ti5O12, [23][24][25][26][27][28] anatase, [6][7][8][9][10][11][12] TiO2-B bronze [29][30][31][32][33] and amorphous phases, [34][35][36][37] are prototypical Li-ion anodes that charge through lithium insertion and surface reactions in nanostructured electrodes. In particular, anatase TiO2 has charge storage densities competitive with conventional graphite electrodes and a small volume change during Li-ion insertion that allows for high cycle and calendar lifetimes at fast charging rates.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Lithium Insertion in Electrochromic Titanium Dioxide Nanocrystal Ensembles

Dahlman¹,

Heo²,

Zhang³

et al. 2020

Preprint

View full text Add to dashboard Cite

Nanocrystalline anatase TiO2 is a robust model anode for Li-insertion in batteries. The influence of nanocrystal size on the equilibrium potential and kinetics of Li-insertion is investigated with in operando spectroelectrochemistry of thin film electrodes. Distinct visible and infrared responses correlate with Li-insertion and electron accumulation, respectively, and these optical signals are used to deconvolute Li-insertion from other electrochemical responses, such as double-layer capacitance and electrolyte leakage. Electrochemical titration and phase-field simulations reveal that a difference in surface energies between anatase and lithiated phases of TiO2 systematically tunes Li-insertion potentials with particle size. However, particle size does not affect the kinetics of Li-insertion in ensemble electrodes. Rather, Li-insertion rates depend on applied overpotential, electrolyte concentration, and initial state-of-charge. We conclude that Li diffusivity and phase propagation are not rate-limiting during Li-insertion in TiO2 nanocrystals. Both of these processes occur rapidly once the transformation between the low-Li anatase and high-Li orthorhombic phases begins in a particle. Instead, discontinuous kinetics of Li accumulation in TiO2 particles prior to the phase transformations limits (dis)charging rates. We demonstrate a practical means to deconvolute non-equilibrium charging behavior in nanocrystalline electrodes through a combination of colloidal synthesis, phase field simulations and spectroelectrochemistry.

show abstract

Li-ion battery cathode performance from the electrospun binary LiCoO2 to ternary Li2CoTi3O8

Kap

Inan

et al. 2020

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Lithium Titanate‐Based Lithium‐Ion Batteries

Cited by 4 publications

References 185 publications

Dynamics of Lithium Insertion in Electrochromic Titanium Dioxide Nanocrystal Ensembles

Dynamics of Lithium Insertion in Electrochromic Titanium Dioxide Nanocrystal Ensembles

Dynamics of Lithium Insertion in Electrochromic Titanium Dioxide Nanocrystal Ensembles

Li-ion battery cathode performance from the electrospun binary LiCoO2 to ternary Li2CoTi3O8

Contact Info

Product

Resources

About