Enhanced cyclic stability of NCM-622 cathode by Ti3+ doped TiO2 coating

Xi, Xiao-Shuang; Fan, Yunying; Liu, Yichun; Chen, Zhuo; Zou, Jian‐Ping; Zhu, Shenghuo

doi:10.1016/j.jallcom.2021.159664

Cited by 24 publications

(7 citation statements)

References 41 publications

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“…2c), and this phenomenon explains that the positive charges around the Ti atom are increased due to W 6+ doping. 39,40 Therefore, Ti atoms with a large number of positive charges can enhance the adsorption of H 2 O molecules, which is beneficial for improving the photocatalytic hydrogen evolution performance.…”

Section: Resultsmentioning

confidence: 99%

Ultrathin tungsten-doped hydrogenated titanium dioxide nanosheets for solar-driven hydrogen evolution

Chen

Sun

Han

et al. 2022

Inorg. Chem. Front.

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Section: Resultsmentioning

confidence: 99%

Ultrathin tungsten-doped hydrogenated titanium dioxide nanosheets for solar-driven hydrogen evolution

Chen

Sun

Han

et al. 2022

Inorg. Chem. Front.

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“…Common coating materials include metal oxides, phosphates, and uorides. [20][21][22][23] Doping is the introduction of small amounts of foreign ions into the crystal structure of cathode materials to modify their electronic and ionic conductivity, stability, and kinetics. [24][25][26][27] Microstructure control involves the tailoring of the crystal size, morphology, and orientation of the cathode particles to improve their electrochemical kinetics and stability.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of polycrystalline and single-crystal NCM811 cathode materials: the role of crystal defects in electrochemical performance

Zhu,

Ning,

et al. 2024

J. Mater. Chem. A

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“…With a Ni-rich material, increasing the Ni content will result in increases in the specific discharge capacity and the total residual Li content, but losses in capacity retention and thermal stability. , Accordingly, cathode materials displaying high capacity and good thermal stability will require improvements in the interfacial reaction between the cathode material and the electrolyte. This problem has been solved by coating the surface of the cathode material with various materials, including Al 2 O 3 , TiO 2 , and carbon . An Al 2 O 3 coating shell can act as a scavenger to protect the cathode material from HF attack and prevent serious side reactions; a carbon coating can enhance the electrical conductivity of the cathode material without changing its intrinsic properties and avoid unwanted redox reactions.…”

Section: Introductionmentioning

confidence: 99%

Sandwich-Structured Composite Polymer Electrolyte Based on PVDF-HFP/PPC/Al-Doped LLZO for High-Voltage Solid-State Lithium Batteries

Tran

Truong

Zhang

et al. 2023

ACS Appl. Energy Mater.

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High-performance solid-state lithium-metal batteries (SSLMBs) require solid electrolytes displaying outstanding electrochemical stability, excellent ionic conductivity, and high Li+ ion transference number. On top of these, it should also be compatible with the electrodes applied and functionable under room temperature. To achieve these, a solution-casting technique is proposed herein to prepare a flexible composite polymer electrolyte (CPE), which is equipped with a high ionic conductivity and Li+ ion transference number, concurrently applicable in the construction of high-voltage solid-state Li batteries. The proposed CPE, which is made up of poly(vinylidene difluoride-co-hexafluoropropylene) (PVDF-HFP)/polypropylene carbonate (PPC) blend with an Al-doped Li7La3Zr2O12 (Al-LLZO) filler, was sandwiched between PVDF-HFP/PPC–lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) skin layers with SN plasticizer added. This formulation of PVDF-HFP/PPC/Al-LLZO/LiTFSI/SN was abbreviated as sandwich-PPA in our study. Such configuration permits notable resistance reduction at the electrode–electrolyte interface while suppressing Li dendrite growth throughout the robust charging–discharging process. This can be attributed to the excellent performance of the sandwich composite electrolyte membrane, which promises high ionic conductivity (ca. 4.04 × 10–4 S cm–1) and a high Li+ ion transference number (ca. 0.583) at room temperature. A CR2032 coin cell, which is assembled with Al2O3-C@NCA/Sandwich-PPA/Li, delivered a high specific capacity (186.20 mAh g–1 at 0.1C at room temperature), along with its excellent rate performance and cycle stability (discharge capacity of 126.23 mAh g–1; capacity retention of 80.03% after 100 cycles at a rate of 0.5C at room temperature). This verified the potential of our novelty-formulated solid-state electrolyte to secure excellent performance of SSLMBs.

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Enhanced cyclic stability of NCM-622 cathode by Ti3+ doped TiO2 coating

Cited by 24 publications

References 41 publications

Ultrathin tungsten-doped hydrogenated titanium dioxide nanosheets for solar-driven hydrogen evolution

Ultrathin tungsten-doped hydrogenated titanium dioxide nanosheets for solar-driven hydrogen evolution

Comparative study of polycrystalline and single-crystal NCM811 cathode materials: the role of crystal defects in electrochemical performance

Sandwich-Structured Composite Polymer Electrolyte Based on PVDF-HFP/PPC/Al-Doped LLZO for High-Voltage Solid-State Lithium Batteries

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