Improving the Performances of LiCoO[sub 2] Cathode Materials by Soaking Nano-Alumina in Commercial Electrolyte

Liu, Jianyong; Liu, Na; Liu, Daotan; Bai, Ying; Shi, Lihong; Wang, Zhaoxiang; Chen, Liquan; Hennige, Volker; Schuch, Andreas

doi:10.1149/1.2388731

Cited by 44 publications

(44 citation statements)

References 35 publications

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“…For example, Al 2 O 3 coatings have been shown to preferentially react with HF to form AlF 3 , [ 19,86 ] and the HF-scavenging tendency s HF H −Δ − = 0.76 eV HF −1 of Al 2 O 3 is more than twice as large as 0.3 eV HF −1 . To determine an upper bound is not as straightforward because the HF-scavenging tendency is related to the general reactivity of a compound.…”

Section: Constraints On the Design Parameters: The Criteria Of Screeningmentioning

confidence: 99%

Thermodynamic Aspects of Cathode Coatings for Lithium‐Ion Batteries

Aykol

Kirklin

Wolverton

2014

Advanced Energy Materials

106

107

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Metal oxide cathode coatings are capable of scavenging the hydrofluoric acid (HF) (present in LiPF6‐based electrolytes) and improving the electrochemical performance of Li‐ion batteries. Here, a first‐principles thermodynamic framework is introduced for designing cathode coatings that consists of four elements: i) HF‐scavenging enthalpies, ii) volumetric and iii) gravimetric HF‐scavenging capacities of the oxides, and iv) cyclable Li loss into coating components. 81 HF‐scavenging reactions involving binary s‐, p‐ and d‐block metal oxides and fluorides are enumerated and these materials are screened to find promising coatings based on attributes (i‐iv). The screen successfully produces known effective coating materials (e.g., Al2O3 and MgO), providing a validation of our framework. Using this design strategy, promising coating materials, such as trivalent oxides of d‐block transition metals Sc, Ti, V, Cr, Mn and Y, are predicted. Finally, a new protection mechanism that successful coating materials could provide by scavenging the wide bandgap and low Li ion conductivity LiF precipitates from the cathode surfaces is suggested.

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Section: Constraints On the Design Parameters: The Criteria Of Screeningmentioning

confidence: 99%

Thermodynamic Aspects of Cathode Coatings for Lithium‐Ion Batteries

Aykol

Kirklin

Wolverton

2014

Advanced Energy Materials

106

107

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“…In fact, the SEI layer that forms in the cathode may be more complex than that in anode of the LIB. [20] As noted above, hybrid electrolytes have been widely investigated to improve the performance of LIBs, although the term "hybrid electrolyte" has not actually been used. Perhaps the Li 4 Ti 5 O 12 , Li 4 P 2 O 7 , and SEI-coated layers are too thin (thicknesses ranging from several nanometers to several tens of nanometers) to be regarded as hybrid electrolyte layers.…”

Section: Hybrid Electrolytesmentioning

confidence: 99%

The Development of a New Type of Rechargeable Batteries Based on Hybrid Electrolytes

Zhou

Wang

et al. 2010

ChemSusChem

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Lithium ion batteries (LIBs), which have the highest energy density among all currently available rechargeable batteries, have recently been considered for use in hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and pure electric vehicles (PEV). A major challenge in this effort is to increase the energy density of LIBs to satisfy the industrial needs of HEVs, PHEVs, and PEVs. Recently, new types of lithium-air and lithium-copper batteries that employ hybrid electrolytes have attracted significant attention; these batteries are expected to succeed lithium ion batteries as next-generation power sources. Herein, we review the concept of hybrid electrolytes, as well as their advantages and disadvantages. In addition, we examine new battery types that use hybrid electrolytes.

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“…Li 3 AlF 6 and AlF 3 was found on LiCoO 2 after soaking in the nano-Al 2 O 3 -added electrolyte. [117] These results indicate that the oxides for coating, such as Al 2 O 3 , MgO, and ZrO 2 , may not be stable in a LiPF 6 -based electrolyte that contains a trace amount of H 2 O. They may convert into fluorides finally to stabilize the active surface of LiCoO 2 .…”

mentioning

confidence: 94%

Research on Advanced Materials for Li‐ion Batteries

et al. 2009

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In order to address power and energy demands of mobile electronics and electric cars, Li‐ion technology is urgently being optimized by using alternative materials. This article presents a review of our recent progress dedicated to the anode and cathode materials that have the potential to fulfil the crucial factors of cost, safety, lifetime, durability, power density, and energy density. Nanostructured inorganic compounds have been extensively investigated. Size effects revealed in the storage of lithium through micropores (hard carbon spheres), alloys (Si, SnSb), and conversion reactions (Cr2O3, MnO) are studied. The formation of nano/micro core–shell, dispersed composite, and surface pinning structures can improve their cycling performance. Surface coating on LiCoO2 and LiMn2O4 was found to be an effective way to enhance their thermal and chemical stability and the mechanisms are discussed. Theoretical simulations and experiments on LiFePO4 reveal that alkali metal ions and nitrogen doping into the LiFePO4 lattice are possible approaches to increase its electronic conductivity and does not block transport of lithium ion along the 1D channel.

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Improving the Performances of LiCoO[sub 2] Cathode Materials by Soaking Nano-Alumina in Commercial Electrolyte

Cited by 44 publications

References 35 publications

Thermodynamic Aspects of Cathode Coatings for Lithium‐Ion Batteries

Thermodynamic Aspects of Cathode Coatings for Lithium‐Ion Batteries

The Development of a New Type of Rechargeable Batteries Based on Hybrid Electrolytes

Research on Advanced Materials for Li‐ion Batteries

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