Hydrothermal-assisted synthesis of surface aluminum-doped LiCoO2 nanobricks for high-rate lithium-ion batteries

Zhou, Tianjun; Wang, Chunhui; Zhou, Ling; Zeng, Xifeng; Shao, Li; Zhou, Jun; Zhou, Chunxian; Huang, Changsheng; Xi, Xiaoming; Yang, Lishan

doi:10.1016/j.ceramint.2018.05.128

Cited by 40 publications

(9 citation statements)

References 46 publications

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“…40,41 To further clarify the effect of different cleaned surfaces on the electrode process, we carry out EIS in a frequency range from 100 kHz to 0.01 Hz at an amplitude of 5 mV, as shown in Figure 9d, where R s refers to the uncompensated ohmic resistance of the electrode, R SEI is assigned to Li + migration through the SEI film, and R ct is related to surface charge transfer progress. 42,43 On the base of the equivalent circuit, the electrode 7D-4.5 has a lower R ct (958 Ω) than the 7D-4.3 (1241 Ω), indicating that the 7D-4.5 can effectively suppress the increase of polarization resistance. Such a higher value of R ct of 7D-4.3 might be attributed to the larger amount of residual Li 2 CO 3 and overgrowth of the NiO layer, both of which may block Li + diffusion between the NCA cathode and the electrolyte.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Air-Induced Degradation and Electrochemical Regeneration for the Performance of Layered Ni-Rich Cathodes

Wang

Shao

Guo

et al. 2019

ACS Appl. Mater. Interfaces

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Nickel-rich layered oxides are promising cathodes for power batteries owing to their high capacity and low cost. However, during the production, storage, and application of nickel-rich cathodes, especially in case the Ni content exceeds 70%, their surfaces almost inevitably react with ambient air to form electrochemically inert Li2CO3 and LiOH, leading to significant capacity loss and therefore imposing a significant hurdle to practical applications of nickel-rich cathodes. Here, we reveal surface structures and electrochemical properties of the exposed LiNi0.8Co0.15Al0.05O2 (NCA) cathodes and investigate systematically the impact of exposure humidity, temperature, and time on NCA cathodes. We demonstrate that introduction of a 3.0–4.5 V galvanostatic cycling operation at initial cycles can remarkably regenerate the subsequent 3.0–4.3 V battery performances of the exposed cathode. This work represents a facile method to regenerate the battery performance of surface-degraded nickel-rich cathodes, opening up an avenue in fulfilling efficient production, storage, and application of nickel-rich cathode materials.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Air-Induced Degradation and Electrochemical Regeneration for the Performance of Layered Ni-Rich Cathodes

Wang

Shao

Guo

et al. 2019

ACS Appl. Mater. Interfaces

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“…5a. It is clearly seen that the CV curves of both anodes are similar, suggesting that identical electrochemical processes occur over successive discharge/charge cycles, and the doping of Al 3? does not affect the electrochemical reaction process of (CoCrFeMnNi) 0.6 O 4-d HEO [33,[43][44][45]. That is to say, the doped Al 3? anode, the cathodic peaks in the first cathodic reduction process appear at about 1.56 V and 0.52 V, corresponding to the reduction of active transition-metal cations, and the formation of Li 2 O matrix.…”

Section: Electrochemical Performancementioning

confidence: 93%

Porous spinel-type (Al0.2CoCrFeMnNi)0.58O4-δ high-entropy oxide as a novel high-performance anode material for lithium-ion batteries

et al. 2021

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Owing to their entropy stabilization and multi-principal effect, transition-metalbased high-entropy oxides are attracting extensive attention as an effective family of anode materials for lithium ion batteries (LIBs). Herein, spinel-type (Al 0.2 CoCrFeMnNi) 0.58 O 4-d HEO nanocrystalline powder with high concentration of oxygen vacancies is successfully prepared by the method of solution combustion synthesis (SCS), and explored as a novel anode active material for LIBs. As compared to (CoCrFeMnNi) 0.6 O 4-d , the inactive Al 3? -doped (Al 0.2-CoCrFeMnNi) 0.58 O 4-d anode provides more than twice the reversible specific capacity of 554 mAh g -1 after 500 cycles at a specific current of 200 mA g -1 , accompanied with good rate capability (634 mAh g -1 even at 3 A g -1 ) and cycling performance. The enhanced electrochemical properties can be attributed to that inactive Al 3? -doping resulted into the more space for Li ? intercalation and deintercalation, enhanced structural stability, and the improved electronic conductivity and Li ? diffusivity.

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“…The large resistance of R sh‑2 gives rise to a serious impediment to carrier transport from ligands to the MB electrolyte and further decreases the amount of photogenerated carriers reacting with MB, which may be the reason for their restricted photochemical property (e.g., photocatalytic degradation property). By contrast, EIS spectra of γ-CsPbI 3 NCs fabricated with WS 2 reveal a sloped line in the low-frequency region and a semicircle in the high-frequency region, which is in accordance with the carrier-transfer reaction at the CsPbI 3 |WS 2 interface (shunt resistance R sh‑1 ) and Warburg impedance W s relevant to carriers at the WS 2 |MB electrolyte interface, respectively. − These phenomena indicate that the electrochemical performances are highly related to the interfacial carrier-transfer process and diffusion control. Consistent with the variation in Table S5, it is clear that an efficient charge-transfer process will lead to a small R sh‑1 , and γ-CsPbI 3 NCs and WS 2 form a heterostructure where γ-CsPbI 3 NCs grow in-situ on the surface of WS 2 , which is beneficial for carrier transport.…”

Section: Resultsmentioning

confidence: 91%

Enhanced Photocatalytic Property of γ-CsPbI₃ Perovskite Nanocrystals with WS₂

Zhang

Tai

Zhou

et al. 2019

ACS Sustainable Chem. Eng.

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Black perovskite-phase cesium lead tri-iodide (CsPbI 3 ) has shown great potential in photochemical applications. However, colloidal CsPbI 3 still suffers from the existence of ligands attached to the surface of nanocrystals (NCs) and serious photoluminescence (PL) quenching. Here, we develop two different γ-phase CsPbI 3 (γ-CsPbI 3 ) NCs/ WS 2 heterostructures with two different two-dimensional morphologies of WS 2 (nanoplates and few-layered WS 2 nanosheets) to improve the photocatalytic property of γ-CsPbI 3 NCs. The large surface area and the presence of abundant functional groups on the surface of WS 2 enable a bonding interaction with precursors in the mixture solution, which can reduce the number of ligands and promote the formation and crystal quality of γ-CsPbI 3 NCs. Exhilaratingly, we find that γ-CsPbI 3 NCs fabricated with few-layered WS 2 nanosheets exhibit a significant enhancement in their photocatalytic property, which may result from the increased amount and improved crystal quality of γ-CsPbI 3 NCs and the superior carrier-transport property of few-layered WS 2 nanosheets, and these effects are beneficial for producing abundant hydroxyl radicals to completely degrade methylene blue (MB). The fresh γ-CsPbI 3 NCs/few-layered WS 2 nanosheets show a high photocatalytic degradation efficiency of nearly 100% in 30 min, and completely degrade MB into low-weight and low-toxicity inorganic molecules without any intermediate degradation products.

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Hydrothermal-assisted synthesis of surface aluminum-doped LiCoO2 nanobricks for high-rate lithium-ion batteries

Cited by 40 publications

References 46 publications

Air-Induced Degradation and Electrochemical Regeneration for the Performance of Layered Ni-Rich Cathodes

Air-Induced Degradation and Electrochemical Regeneration for the Performance of Layered Ni-Rich Cathodes

Porous spinel-type (Al0.2CoCrFeMnNi)0.58O4-δ high-entropy oxide as a novel high-performance anode material for lithium-ion batteries

Enhanced Photocatalytic Property of γ-CsPbI₃ Perovskite Nanocrystals with WS₂

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Hydrothermal-assisted synthesis of surface aluminum-doped LiCoO2 nanobricks for high-rate lithium-ion batteries

Cited by 40 publications

References 46 publications

Air-Induced Degradation and Electrochemical Regeneration for the Performance of Layered Ni-Rich Cathodes

Air-Induced Degradation and Electrochemical Regeneration for the Performance of Layered Ni-Rich Cathodes

Porous spinel-type (Al0.2CoCrFeMnNi)0.58O4-δ high-entropy oxide as a novel high-performance anode material for lithium-ion batteries

Enhanced Photocatalytic Property of γ-CsPbI3 Perovskite Nanocrystals with WS2

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Enhanced Photocatalytic Property of γ-CsPbI₃ Perovskite Nanocrystals with WS₂