Enhanced Electrochemical Properties of All-Solid-State Batteries Using a Surface-Modified LiNi0.6Co0.2Mn0.2O2 Cathode

Lim, Chang Sung; Park, Yong Joon

doi:10.33961/jecst.2020.00969

Cited by 2 publications

(5 citation statements)

References 37 publications

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“…After charging Ni-rich layered oxides, an electrochemical reaction provides mainly Ni 4+ species in the cathode. Because these species are quite electrochemically unstable, means of reducing them are being sought via an additional chemical reaction with electrolyte components in the cell [16][17][18][19][20][21][22]. Notably, Ni-rich layered oxides cathode materials have high Ni content, which significantly accelerates electrolyte decomposition due to increased Ni amount in the layered structure.…”

Section: Introductionmentioning

confidence: 99%

Triallyl Borate as an Effective Separator/Cathode Interphase Modifier for Lithium-ion Batteries

Kim¹,

Lee²,

Yim³

2023

J. Electrochem. Sci. Technol

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Ni-rich layered oxides cathode has recently gained attention as an advanced cathode material due to their applicable energy density. However, as the Ni component in the layered site is increased, the high reactivity of Ni<sup>4+</sup> results in parasitic reaction associated with decomposing electrolyte, which leads to a rapid decreasing the lifespan of the cell. The electrolyte additive triallyl borate (TAB) improves interfacial stability, leading to a stable cathode–electrolyte interphase (CEI) layer on the LNCM83 cathode. A multi-functionalized TAB additive can produce a uniformly distributed CEI layer via electrochemical oxidation, which implies an increase in long-term cycling performance. After 100 cycles at elevated temperature, the cell tested by 0.75 TAB retained 88.3% of its retention ratio, whereas the cell performed by TAB-free electrolyte retained 64.1% of its retention. Once the TAB additive formed CEI layers on the LNCM83 cathode, it inhibited the decomposition of carbonate-based solvents species in addition to the dissolution of transition metal components from the cathode. The addition of TAB to LNCM83 cathode material is believed to be a promising way to increase the electrochemical performance.

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Section: Introductionmentioning

confidence: 99%

Triallyl Borate as an Effective Separator/Cathode Interphase Modifier for Lithium-ion Batteries

Kim¹,

Lee²,

Yim³

2023

J. Electrochem. Sci. Technol

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“…All-solid-state batteries (ASSBs) based on nonflammable inorganic solid electrolytes have gained significant attention [1][2][3][4][5]. The safety issues associated with lithium-ion batteries (LIBs) are expected to be remarkably improved by excluding the use of flammable liquid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…Lithium thiophosphate, a sulfide electrolyte, is recognized as a promising electrolyte owing to its high ionic conductivity and favorable mechanical performance. However, sulfide electrolytes cannot maintain electrochemical stability in the voltage range for charging/discharging and cause undesirable side reactions with oxide cathodes due to their high reactivity [1][2][3][4][5][6][7]. Therefore, the interfacial layer attributed to side reactions and sulfide decomposition is formed at the cathode/electrolyte interface, which hinders the efficient movement of electrons and lithium ions during cycling [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…However, sulfide electrolytes cannot maintain electrochemical stability in the voltage range for charging/discharging and cause undesirable side reactions with oxide cathodes due to their high reactivity [1][2][3][4][5][6][7]. Therefore, the interfacial layer attributed to side reactions and sulfide decomposition is formed at the cathode/electrolyte interface, which hinders the efficient movement of electrons and lithium ions during cycling [1][2][3][4][5][6][7]. This instability at the cathode/electrolyte interface is a critical issue that limits the commercialization of ASSBs based on sulfide electrolytes [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the interfacial layer attributed to side reactions and sulfide decomposition is formed at the cathode/electrolyte interface, which hinders the efficient movement of electrons and lithium ions during cycling [1][2][3][4][5][6][7]. This instability at the cathode/electrolyte interface is a critical issue that limits the commercialization of ASSBs based on sulfide electrolytes [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Li<bold>3</bold>PO<bold>4</bold> Coated Li[Ni<bold>0.75</bold>Co<bold>0.1</bold>Mn<bold>0.15</bold>]O<bold>2</bold> Cathode for All-Solid-State Batteries Based on Sulfide Electrolyte

Lee

Park

2022

J. Electrochem. Sci. Technol

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Surface coating of cathodes is an essential process for all-solid-state batteries (ASSBs) based on sulfide electrolytes as it efficiently suppresses interfacial reactions between oxide cathodes and sulfide electrolytes. Based on computational calculations, Li 3 PO 4 has been suggested as a promising coating material because of its higher stability with sulfides and its optimal ionic conductivity. However, it has hardly been applied to the coating of ASSBs due to the absence of a suitable coating process, including the selection of source material that is compatible with ASSBs. In this study, polyphosphoric acid (PPA) and (NH 4 ) 2 HPO 4 were used as source materials for preparing a Li 3 PO 4 coating for ASSBs, and the properties of the coating layer and coated cathodes were compared. The Li 3 PO 4 layer fabricated using the (NH 4 ) 2 HPO 4 source was rough and inhomogeneous, which is not suitable for the protection of the cathodes. Moreover, the water-based coating solution with the (NH 4 ) 2 HPO 4 source can deteriorate the electrochemical performance of high-Ni cathodes that are vulnerable to water. In contrast, when an alcohol-based solvent was used, the PPA source enabled the formation of a thin and homogeneous coating layer on the cathode surface. As a consequence, the ASSBs containing the Li 3 PO 4 -coated cathode prepared by the PPA source exhibited significantly enhanced discharge and rate capabilities compared to ASSBs containing a pristine cathode or Li 3 PO 4 -coated cathode prepared by the (NH 4 ) 2 HPO source.

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Enhanced Electrochemical Properties of All-Solid-State Batteries Using a Surface-Modified LiNi0.6Co0.2Mn0.2O2 Cathode

Cited by 2 publications

References 37 publications

Triallyl Borate as an Effective Separator/Cathode Interphase Modifier for Lithium-ion Batteries

Triallyl Borate as an Effective Separator/Cathode Interphase Modifier for Lithium-ion Batteries

Li<bold>3</bold>PO<bold>4</bold> Coated Li[Ni<bold>0.75</bold>Co<bold>0.1</bold>Mn<bold>0.15</bold>]O<bold>2</bold> Cathode for All-Solid-State Batteries Based on Sulfide Electrolyte

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Enhanced Electrochemical Properties of All-Solid-State Batteries Using a Surface-Modified LiNi0.6Co0.2Mn0.2O2 Cathode

Cited by 2 publications

References 37 publications

Triallyl Borate as an Effective Separator/Cathode Interphase Modifier for Lithium-ion Batteries

Triallyl Borate as an Effective Separator/Cathode Interphase Modifier for Lithium-ion Batteries

Li&lt;bold&gt;3&lt;/bold&gt;PO&lt;bold&gt;4&lt;/bold&gt; Coated Li[Ni&lt;bold&gt;0.75&lt;/bold&gt;Co&lt;bold&gt;0.1&lt;/bold&gt;Mn&lt;bold&gt;0.15&lt;/bold&gt;]O&lt;bold&gt;2&lt;/bold&gt; Cathode for All-Solid-State Batteries Based on Sulfide Electrolyte

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Product

Resources

About

Li<bold>3</bold>PO<bold>4</bold> Coated Li[Ni<bold>0.75</bold>Co<bold>0.1</bold>Mn<bold>0.15</bold>]O<bold>2</bold> Cathode for All-Solid-State Batteries Based on Sulfide Electrolyte