Fabrication of porous lithium titanate self-supporting anode for high performance lithium-ion capacitor

Liu, Yan; Wang, Wenqiang; Chen, Jin; Li, Xingwei; Cheng, Qilin; Wang, Gengchao

doi:10.1016/j.jechem.2020.03.075

Cited by 47 publications

(15 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When cycled over 5000 cycles at 500 C, the capacity of Vo-LTO-NS-3 still maintains at 120 mA h g −1 with a high Coulombic efficiency (Figure 3c), which shows a higher capacity and cycle stability than the recent works. 50,54 Interestingly, the capacity of Vo-LTO-NS-3 after 3000 cycles (Figure S8, Supporting Information) is the highest rate capacity among those of LTO-NS (Figure S9, Supporting Information) and AC (Figure S10, Supporting Information) at 100 C. The more physical characterization and in-depth analyses were carried out to shed light on the mechanism of the S11c, Supporting Information), the binding energy of the pack shifts to lower energy (54.5 eV). For the spectra of O 1s (Figure S11d, Supporting Information), the binding energy of the peak (529.67 eV) for LTO-NS decreases to 529.58 eV (Vo-LTO-NS-3), which is caused by the redistribution of O charge.…”

Section: Resultsmentioning

confidence: 99%

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Liu

Huang

Cai

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Boosting sufficient Li + ion mobility in Li 4 Ti 5 O 12 (LTO) is crucial for high-rate performance lithium storage. Here, an ultrafast charge storage oxygen vacancy two-dimensional (2D) LTO nanosheet was successfully fabricated through a one-pot hydrothermal method. The selectively doped Al 3+ into octahedron Li + /Ti 4+ 16d sites not only provide bulk oxygen vacancy and appropriate distorted TiO 6 octahedra to facilitate Li + ions diffusion, but also serve as a "pillar" to stabilize the Ti−O framework. The oxygen vacancy lowers Li + ion diffusion energy barrier. Moreover, the 2D structure provides open diffusion channels for fast Li + ion transport. As a result, the sample shows excellent electrochemical performance for bifunctional lithium storage. As a lithium-ion battery anode, the capacity retention reaches 112.8 mA h g −1 after 5000 cycles at 40 C with a fading rate of 0.288% per 100 cycles. Meanwhile, as a lithium-ion capacitor anode, it exhibits an excellent rate capacity of 120 mA h g −1 after 5000 cycles at 500 C with nearly 100% Coulombic efficiency. The produced LTO shows much higher rate capacity and longer lifetime than the reported LTO. Density functional theory calculations also demonstrate that oxygen vacancy can facilitate Li + ion diffusion kinetics. The relationship between oxygen vacancy content and Li + ions diffusion energy barrier in LTO is quantified. This work pioneers a defect engineering strategy for synthesized high-performance electrode materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Liu

Huang

Cai

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The LIC showed prominent electrochemical properties, which obtained the energy density of 31.5 Wh ⋅ kg −1 at the power density of 9.45 kW ⋅ kg −1 and its capacity retention and columbic efficiency reaches 98 % and 95 % after 1000 cycles respectively, as shown in Figure 4a. And a team fabricates porous lithium titanate anode that its nano‐structured particle size and penetrating lithium ion transmission channels could improve lithium ion diffusion coefficient [31] . It can be proved in Figure 4b, A w is Warburg coefficient and D Li is inversely proportional to A w .…”

Section: Achievements On Anode Of High Performance Licsmentioning

confidence: 97%

A Minireview on High‐Performance Anodes for Lithium‐Ion Capacitors

Zheng

Xing

Zhang

et al. 2021

Batteries & Supercaps

View full text Add to dashboard Cite

Lithium‐ion capacitors (LICs) are assembled with a battery‐type anode and a capacitor‐type cathode, so they combine high energy density of lithium‐ion batteries (LIBs) and excellent rate and cycling performance of supercapacitors (SCs). However, the current level still cannot satisfy the target. And the leading problem is LICs cannot offer enough capacity under high power density and long cycling life due to the storage mechanism of anodes. This paper gives the present attempts on electrodes, solid–electrolyte interface (SEI) and operation conditions. And after discussion, the paper holds that the discharge voltage plateau of anodes should be well‐chosen, and the anode structure like an ordered mesoporous structure can provide fast and versatile transport pathways for charge transfer and provide free space to accommodate the volume change upon Li‐ions insertion/extraction. In addition, the multilayer SEI with the synergism like LiF and Li2CO3 can provide better electronic insulation and ion conductivity. Furthermore, appropriate working potential is also an effective mean to improve performance of LICs.

show abstract

“…2D materials offer various distinct characteristics for charge storage in PICs. [32,33] Firstly, 2D materials have a high SSA, resulting in numerous exposed active sites, and thus, the ion diffusion length is short. [34] Secondly, several 2D materials have suitable interlayer spacing, which facilitates the insertion and extraction of potassium ions.…”

Section: D Materials For Picsmentioning

confidence: 99%

Application of 2D Materials to Potassium‐Ion Hybrid Capacitors

Zhang

Deng

et al. 2021

ChemSusChem

View full text Add to dashboard Cite

Metal‐ion hybrid supercapacitors (MICs) are a new type of electrochemical energy storage (EES) device, consisting of a battery‐type electrode and a supercapacitor (SC)‐type electrode. Exhibiting the advantages of both batteries and SCs (e. g., good energy density, excellent power density and long cycle life), these advanced energy storage devices have considerable commercial application prospects. Among MICs, potassium‐ion hybrid supercapacitors (PICs) have several further advantages, including abundancy of resources, low standard electrode potential, and low cost. PICs are regarded as potential substitutes for lithium‐ or sodium‐ion hybrid supercapacitors. However, the practical applications of PICs remain limited, owing to the imbalance of kinetics and capacity between the electrodes, the slow ion/electron diffusion rate, and the poor electrode structural stability. Recently, 2D materials with distinct structures and fascinating features have elicited widespread attention for application in PICs, thus achieving significant enhancements, ranging from charge storage capacity to reaction kinetics. This Review discusses research progress in 2D materials for PICs. Firstly, the energy storage principle and development requirements of MICs are introduced. The pivotal advantages and significant roles of 2D materials in the fabrication of PICs are then discussed in detail. Lastly, the challenges and prospects of the application of 2D materials to high‐performance PICs are presented.

show abstract

Fabrication of porous lithium titanate self-supporting anode for high performance lithium-ion capacitor

Cited by 47 publications

References 73 publications

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

Oxygen Vacancy Enhanced Two-Dimensional Lithium Titanate for Ultrafast and Long-Life Bifunctional Lithium Storage

A Minireview on High‐Performance Anodes for Lithium‐Ion Capacitors

Application of 2D Materials to Potassium‐Ion Hybrid Capacitors

Contact Info

Product

Resources

About