Nanostructured Anode Material for High‐Power Battery System in Electric Vehicles

Amine, Khalil; Belharouak, Ilias; Chen, Zonghai; Tran, Taison; Yumoto, Hiroyuki; Ota, Naoki; Myung, Seung‐Taek; Sun, Yang Kook

doi:10.1002/adma.201000441

Cited by 377 publications

(232 citation statements)

References 25 publications

Supporting

Mentioning

226

Contrasting

Unclassified

Order By: Relevance

“…Among the complex causes of the existing defects of commercial LIBs, carbonaceous anodes play a significant role. First of all, the Li‐insertion voltage of commercial graphite anode is at ≈100 mV versus Li + /Li, which is very close to the redox potential of lithium metal 5, 6. Thus, under the condition of high‐power charge rates, lithium plating is prone to occur on the surface of the anode due to an extensive polarization of carbon materials, then potentially triggering thermal runaway when some lithium dendrites penetrate into the separator.…”

Section: Introductionmentioning

confidence: 55%

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li₄Ti₅O₁₂ in Lithium‐Ion Battery

et al. 2017

View full text Add to dashboard Cite

Through a facile sodium sulfide (Na2S)‐assisted hydrothermal treatment, clean and nondefective surfaces are constructed on micrometer‐sized Li4Ti5O12 particles. The remarkable improvement of surface quality shows a higher first cycle Coulombic efficiency (≈95%), a significantly enhanced cycling performance, and a better rate capability in electrochemical measurements. A combined study of Raman spectroscopy and inductive coupled plasma emission spectroscopy reveals that the evolution of Li4Ti5O12 surface in a water‐based hydrothermal environment is a hydrolysis–recrystallization process, which can introduce a new phase of anatase‐TiO2. While, with a small amount of Na2S (0.004 mol L−1 at least), the spinel‐Li4Ti5O12 phase is maintained without a second phase. During this process, the alkaline environment created by Na2S and the surface adsorption of the sulfur‐containing group (HS− or S2−) can suppress the recrystallization of anatase‐TiO2 and renew the particle surfaces. This finding gives a better understanding of the surface–property relationship on Li4Ti5O12 and guidance on preparation and modification of electrode material other than coating or doping.

show abstract

Section: Introductionmentioning

confidence: 55%

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li₄Ti₅O₁₂ in Lithium‐Ion Battery

et al. 2017

View full text Add to dashboard Cite

show abstract

“…As a result of its high operating voltage, LTO experiences no surface passivation due to the reduction of carbonate solvents, or the formation of dendritic lithium, which leads to long cycle-life and improved safety [104]. In addition, LTO cells have demonstrated safety at ultra-high charge potentials, resulting in minimal thermal runaway [105]. LTO can accommodate up to 3 Li + per formula unit, resulting in an end-phase of Li7Ti5O12 [106], with a theoretical capacity of 175 mA h g -1 .…”

Section: Li4ti5o12 (Lto)mentioning

confidence: 99%

“…LTO can accommodate up to 3 Li + per formula unit, resulting in an end-phase of Li7Ti5O12 [106], with a theoretical capacity of 175 mA h g -1 . While such capacity is lower than graphite, intercalation rates are fast and further enhanced through nanostructuring, leading to the potential application of LTO in future high-rate Li-ion batteries [105]. While LTO displays such desirable Li-ion characteristics, it suffers from poor electronic conductivity.…”

Section: Li4ti5o12 (Lto)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

View full text Add to dashboard Cite

Access to the full text of the published version may require a subscription. Rights © Tsinghua University Press and Springer-Verlag Berlin ABSTRACTThe performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li + ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li + diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions.In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures (both anode and cathode), as drivers of potential next-generation electrochemical energy storage devices.

show abstract

“…Unfortunately, as LTO particle size decreases to the nanoscale, the specific surface area of the materials increased greatly, which significantly introduces irreversible reactions with the electrolyte solution 26, 27. Furthermore, nanostructured materials suffer from a very low tap density leading to a low volumetric energy density 28, 29. For electrodes with a high tap density, the Li‐ion transport throughout the electrodes has been shown to limit the capacity at high (dis)charge rates 30, 31.…”

Section: Introductionmentioning

confidence: 99%

High‐Density Microporous Li₄Ti₅O₁₂ Microbars with Superior Rate Performance for Lithium‐Ion Batteries

Tang

Wang

et al. 2017

Advanced Science

View full text Add to dashboard Cite

Nanosized Li4Ti5O12 (LTO) materials enabling high rate performance suffer from a large specific surface area and low tap density lowering the cycle life and practical energy density. Microsized LTO materials have high density which generally compromises their rate capability. Aiming at combining the favorable nano and micro size properties, a facile method to synthesize LTO microbars with micropores created by ammonium bicarbonate (NH4HCO3) as a template is presented. The compact LTO microbars are in situ grown by spinel LTO nanocrystals. The as‐prepared LTO microbars have a very small specific surface area (6.11 m2 g−1) combined with a high ionic conductivity (5.53 × 10−12 cm−2 s−1) and large tap densities (1.20 g cm−3), responsible for their exceptionally stable long‐term cyclic performance and superior rate properties. The specific capacity reaches 141.0 and 129.3 mAh g−1 at the current rate of 10 and 30 C, respectively. The capacity retention is as high as 94.0% and 83.3% after 500 and 1000 cycles at 10 C. This work demonstrates that, in situ creating micropores in microsized LTO using NH4HCO3 not only facilitates a high LTO tap density, to enhance the volumetric energy density, but also provides abundant Li‐ion transportation channels enabling high rate performance.

show abstract

Nanostructured Anode Material for High‐Power Battery System in Electric Vehicles

Abstract: A new MSNP‐LTO anode is developed to enable a high‐power battery system that provides three times more power than any existing battery system. It shows excellent cycle life and low‐temperature performance, and exhibits unmatched safety characteristics.

Cited by 377 publications

References 25 publications

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li₄Ti₅O₁₂ in Lithium‐Ion Battery

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li₄Ti₅O₁₂ in Lithium‐Ion Battery

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

High‐Density Microporous Li₄Ti₅O₁₂ Microbars with Superior Rate Performance for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Nanostructured Anode Material for High‐Power Battery System in Electric Vehicles

Abstract: A new MSNP‐LTO anode is developed to enable a high‐power battery system that provides three times more power than any existing battery system. It shows excellent cycle life and low‐temperature performance, and exhibits unmatched safety characteristics.

Cited by 377 publications

References 25 publications

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li4Ti5O12 in Lithium‐Ion Battery

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li4Ti5O12 in Lithium‐Ion Battery

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

High‐Density Microporous Li4Ti5O12 Microbars with Superior Rate Performance for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li₄Ti₅O₁₂ in Lithium‐Ion Battery

A Facile Surface Reconstruction Mechanism toward Better Electrochemical Performance of Li₄Ti₅O₁₂ in Lithium‐Ion Battery

High‐Density Microporous Li₄Ti₅O₁₂ Microbars with Superior Rate Performance for Lithium‐Ion Batteries