Preparation of an Amorphous 80LiCoO&lt;sub&gt;2&lt;/sub&gt;·20Li&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; Thin Film Electrode by Pulsed Laser Deposition

Nakagawa, Masaki; Nagao, Kenji; Ito, Yusuke; Deguchi, Minako; Sakuda, Atsushi; Hayashi, Akitoshi; Tatsumisago, Masahiro

doi:10.5796/electrochemistry.18-00021

Cited by 2 publications

(4 citation statements)

References 25 publications

(18 reference statements)

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“…As a positive electrode, a mixture of an active material, solid electrolyte, and acetylene black powders was used. [24] The all-solid-state cells using the fully amorphous electrode materials showed much higher capacity than that using the mechanochemically synthesized LiCoO 2 -Li 2 SO 4 positive electrode material. All of the cells operated as secondary batteries with capacities larger than 150 mAh g −1 .…”

Section: Effect Of the Ni Content In Nmc On The Charge-discharge Perfmentioning

confidence: 88%

“…Over the past decades, many types of solid electrolytes with high conductivities have been discovered. [22][23][24] The obtained amorphous LiCoO 2 -Li 2 SO 4 positive electrode material exhibited the best charge-discharge performance. [18] In addition, there are advantages in the use of amorphous materials to achieve higher capacities and better cycle characteristics owing to the open and random structures.…”

Section: Introductionmentioning

confidence: 96%

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Amorphous Ni‐Rich Li(Ni₁₋_x₋_yMn_xCo_y)O₂–Li₂SO₄ Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Nagao

Sakuda

Hayashi

et al. 2019

Adv Materials Inter

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typical organic liquid electrolytes. [1][2][3] Although the safety and reliability of batteries can be potentially improved by utilizing solid electrolytes instead of liquid electrolytes, there are still several challenges in sulfide-type all-solidstate batteries, such as H 2 S generation and chemical reaction with active materials. [4][5][6][7] On the other hand, oxide-type all-solid-state batteries have been regarded as one of the leading candidates to overcome these problems owing to the high chemical and electrochemical stabilities of oxide electrolytes. Despite the merits, the construction of all-oxide solid-state batteries is quite difficult owing to the lack of deformability of the typical crystalline oxide electrolytes, which leads to a poor contact between the active material and solid electrolyte particles. [8] Therefore, high-temperature sintering is required to achieve a good contact. Even if a good contact is achieved, unfavorable chemical reactions between the active material and solid electrolyte might proceed at the high temperature, leading to generation of a highly resistive layer. [9,10] Therefore, formation of an excellent electrode/ electrolyte interface without high-temperature sintering is important for the operation of all-oxide solid-state batteries. In order to achieve a good formability in oxide electrolytes, we have focused on materials with lower melting points such as Li 3 BO 3 . [11] A mechanochemically prepared Li 3 BO 3 glass electrolyte exhibited a relatively high conductivity of 10 −7 S cm −1 at room temperature and good formability. In addition, we previously developed ductile oxide glass-ceramic electrolytes of the pseudobinary system Li 3 BO 3 -Li 2 SO 4 . The Li 2.9 B 0.9 S 0.1 O 3.1 (90Li 3 BO 3 ·10Li 2 SO 4 (mol%)) glass-ceramic electrolyte exhibited a high conductivity of ≈10 −5 S cm −1 at room temperature. [12,13] A good contact with electrode active materials was successfully achieved simply by pressing at room temperature, which was enabled by the excellent formability of the electrolyte.Crystalline materials such as layered, [14,15] spinel, [16] and olivine [17] structures have been utilized as positive electrode materials in typical lithium-ion and all-solid-state batteries. Amorphous materials are also candidates for electrode materials, which generally exhibit higher conductivities than those of the All-solid-state batteries attract significant attention owing to their potential to realize an energy storage system with high safety and energy density. In this paper, a mechanochemical synthesis of novel amorphous positive electrode materials of the Ni-rich LiNi 1−x−y Mn x Co y O 2 (NMC)-Li 2 SO 4 system suitable for oxide-type all-solid-state batteries is reported. Through the mechanochemical treatment with Li 2 SO 4 , excellent formabilities of the electrode materials as those of ductile solid electrolytes are obtained. Owing to the deformability of the active material, a good electrode/electrolyte interface is provided simply by pressing at room temperature. In all...

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Section: Effect Of the Ni Content In Nmc On The Charge-discharge Perfmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 96%

Amorphous Ni‐Rich Li(Ni₁₋_x₋_yMn_xCo_y)O₂–Li₂SO₄ Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Nagao

Sakuda

Hayashi

et al. 2019

Adv Materials Inter

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“…[16a,21a,25] Some of these dopants are simply mixed into the target while others are synthesized to the required stoichiometry. For example, amorphous Li 1.2 Co 0.8 S 0.2 O 2.4 was PLD grown from a pellet with LiCoO 2 mixed with Li 2 S. [26] In some cases the rock salt phase is targeted and PLD coatings such as ZrO 2 are used. [25p] Note, some studies target the LiNi x Mn y Co z O 2 compositions, where x + y + z = 1, taking advantage of the Ni 2 + to Ni 4 + redox couple during cycling.…”

Section: Cathode Materialsmentioning

confidence: 99%

“…Some of these dopants are simply mixed into the target while others are synthesized to the required stoichiometry. For example, amorphous Li 1.2 Co 0.8 S 0.2 O 2.4 was PLD grown from a pellet with LiCoO 2 mixed with Li 2 S . In some cases the rock salt phase is targeted and PLD coatings such as ZrO 2 are used .…”

Section: Cathode Materialsmentioning

confidence: 99%

Pulsed Laser Deposition‐based Thin Film Microbatteries

Fenech

Sharma

2020

Chemistry An Asian Journal

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Emerging applications for robust small format or distributed devices feature a need for power and rechargeable lithium-ion batteries could play a significant role. This review focuses on a high precision technique to controllably grow thin-film electrodes or full all-solid-state batteries, that is, pulsed laser deposition (PLD). The technique and solidstate batteries are introduced followed by a detailed showcase of the depth of PLD-based growth undertaken on cathodes, electrolytes, anodes and whole microbatteries. Emphasis is placed on the various characterization techniques available to study PLD grown components and devices, and how interfaces become both critical and arguably easier to probe in PLD grown films or devices. This work provides a perspective on the techniques, its opportunities for electrodes and devices, and how to probe the resulting growth and its evolution in batteries.

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Preparation of an Amorphous 80LiCoO<sub>2</sub>·20Li<sub>2</sub>SO<sub>4</sub> Thin Film Electrode by Pulsed Laser Deposition

Abstract: ABSTRACT

Cited by 2 publications

References 25 publications

Amorphous Ni‐Rich Li(Ni₁₋_x₋_yMn_xCo_y)O₂–Li₂SO₄ Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Amorphous Ni‐Rich Li(Ni₁₋_x₋_yMn_xCo_y)O₂–Li₂SO₄ Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Pulsed Laser Deposition‐based Thin Film Microbatteries

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Preparation of an Amorphous 80LiCoO<sub>2</sub>·20Li<sub>2</sub>SO<sub>4</sub> Thin Film Electrode by Pulsed Laser Deposition

Abstract: ABSTRACT

Cited by 2 publications

References 25 publications

Amorphous Ni‐Rich Li(Ni1−x−yMnxCoy)O2–Li2SO4 Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Amorphous Ni‐Rich Li(Ni1−x−yMnxCoy)O2–Li2SO4 Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Pulsed Laser Deposition‐based Thin Film Microbatteries

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Product

Resources

About

Amorphous Ni‐Rich Li(Ni₁₋_x₋_yMn_xCo_y)O₂–Li₂SO₄ Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries

Amorphous Ni‐Rich Li(Ni₁₋_x₋_yMn_xCo_y)O₂–Li₂SO₄ Positive Electrode Materials for Bulk‐Type All‐Oxide Solid‐State Batteries