CuO-Coated and Cu2+-doped Co-modified P2-type Na2/3[Ni1/3Mn2/3]O2 for sodium-ion batteries

Dang, Rongbin; Li, Qi; Chen, Minmin; Hu, Zhongbo; Xiao, Xiaoling

doi:10.1039/c8cp06248j

Cited by 67 publications

(47 citation statements)

References 37 publications

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“…The inset figure in Figure 1d shows enlarged XRD patterns of the pristine and treated samples between 13 and 19 °C. It can be seen that the low angle peak has shifted to the left, which is in agreement with other experimental results [22]. Copper oxide coating layers have been formed in treated NMO compounds.…”

Section: Resultssupporting

confidence: 92%

“…The treated NMO was also passed through an X-ray powder diffractometer, and was compared with the NMO before the treatment (as shown in Figure 1d). The inset figure in Figure 1d shows enlarged XRD patterns of the pristine and treated samples between 13 and 19 • C. It can be seen that the low angle peak has shifted to the left, which is in agreement with other experimental results [22]. Nanomaterials 2020, 10, 246 3 of 8…”

Section: Resultssupporting

confidence: 87%

“…After the cycle test is completed, when the current returns to 50 mA/g, the specific capacities of NMO before and after treatment return to 61.2 and 122.1 mAh/g, respectively, which are 87% and 99.5% of the original discharge specific capacity. It is clearly better for the treated NMO in sodium ion intercalation/deintercalation reversible performance, which is in agreement with the NNMO@CuO sample, which also shows better performance [22]. The outstanding rate capability of a treated electrode can be ascribed to the smoothed surface that decreases barriers to improve Na-ion diffusion, and to enlarged layer distances when Cu 2+ is doped into the crystal structure.…”

Section: Resultssupporting

confidence: 73%

“…For treated NMO, after 50 charge and discharge cycles, it still has a lower resistance (as shown in Figure 4b). The Nyquist plot clearly forms a semicycle, which means charge transfer resistance and Warburg impedance [22]. Then, the treated NMO generates stable SEI (Solid Electrolyte Interface) films that are formed by exfoliation of the treated NMO electrode surface during prolonged cycling.…”

Section: Resultsmentioning

confidence: 99%

“…For example, after a cycling test, a Cu 2 O-coated Si anode has less cracks than a pristine Si anode [21]. Dong et al [22] demonstrated that NNMO@CuO cathode material combines the advantage of CuO coating and Cu 2+ doping, and shows prominent cycling performance and rate capability. The CuO coating layer can prevent direct contact between the cathode active material and the electrolyte, and can suppress a side reaction between the cathode material and the unwanted by-product hydrofluoric acid [23].…”

Section: Introductionmentioning

confidence: 99%

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Smoothing the Surface and Improving the Electrochemical Properties of NaxMnO2 by a Wet Chemical Method

Zhao

Lin

et al. 2020

Nanomaterials

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NaxMnO2 (NMO) is treated by a wet chemical method in this paper. The treated NMO can form a copper oxide coating layer, and some of the coating layer can be peeled off, smoothing the surface of particles. Electrochemical measurement shows that treated NMO can maintain 72.6% of its specific capacity after 300 cycles, which is better than the 58.7% specific capacity of untreated NMO materials. Additionally, the ratio of capacity remaining rate can be improved from an initial 87% to 99.5%. So, this wet chemical method is available to smooth the electrode surface and reduce the internal impedance, and thus to effectively improve electrochemical performance during the battery cycle.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Smoothing the Surface and Improving the Electrochemical Properties of NaxMnO2 by a Wet Chemical Method

Zhao

Lin

et al. 2020

Nanomaterials

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Layered Oxide Cathodes Promoted by Structure Modulation Technology for Sodium‐Ion Batteries

Xiao

Abbasi

Zhu

et al. 2020

Adv Funct Materials

177

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Considering the ever‐growing climatic degeneration, sustainable and renewable energy sources are needed to be effectively integrated into the grid through large‐scale electrochemical energy storage and conversion (EESC) technologies. With regard to their competent benefit in cost and sustainable supply of resource, room‐temperature sodium‐ion batteries (SIBs) have shown great promise in EESC, triumphing over other battery systems on the market. As one of the most fascinating cathode materials due to the simple synthesis process, large specific capacity, and high ionic conductivity, Na‐based layered transition metal oxide cathodes commonly suffer from the sluggish kinetics, multiphase evolution, poor air stability, and insufficient comprehensive performance, restricting their commercialization application. Here, this review summarizes the recent advances in layered oxide cathode materials for SIBs through different optimal structure modulation technologies, with an emphasis placed on strategies to boost Na+ kinetics and reduce the irreversible phase transition as well as enhance the store stability. Meanwhile, a thorough and in‐depth systematical investigation of the structure–function–property relationship is also discussed, and the challenges as well as opportunities for practical application electrode materials are sketched. The insights brought forward in this review can be considered as a guide for SIBs in next‐generation EESC.

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Internal and External Co‐Engineering of Stable Cathode Interface Improves Cycle Performance of Polymer Sodium Batteries

Zhang

et al. 2023

Adv Funct Materials

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The development of polymer sodium batteries requires cathode materials with stable interfaces to avoid poor interfacial contact and interfacial side reactions during cycling. Here, a co‐engineering strategy is deployed to tailor the cathode internal structure and improve the cathode interface stability through bonding interactions. Internally, the effect of low‐cost Fe substitution in the obtained Na0.67Mn2/3Fe1/3O2 cathode material renders favorable effects in several aspects. First, the increased lattice constant facilitates Na+ intercalation and thereby lowers the diffusion barrier of Na+ ions. Second, it increases the electronic conductivity, thereby improving the reaction reversibility. Third, the MnO bond length is shortened, which alleviates the Jahn‐Taylor effect and improves structural stability. In addition to these internal effects, the FeOB bond interactions due to Fe substitution promote the decomposition of the tris(trimethylsilane)borate additive and the formation of a dense and uniform cathode electrolyte interface film, leading to improved cycling stability. Owing to the co‐engineering of both internal structure and surface modification, the polymer solid‐state sodium battery with a stable interface exhibits a specific capacity of 85.2 mAh g‐1 after 800 cycles at 1 C.

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CuO-Coated and Cu²⁺-doped Co-modified P2-type Na_2/3[Ni_1/3Mn_2/3]O₂ for sodium-ion batteries

Abstract: Layered P2-type CuO-coated Na2/3[Ni1/3Mn2/3]O2 (NNMO@CuO) with excellent rate capability and cycling performance was investigated as a sodium-ion battery cathode material for the first time.

Cited by 67 publications

References 37 publications

Smoothing the Surface and Improving the Electrochemical Properties of NaxMnO2 by a Wet Chemical Method

Smoothing the Surface and Improving the Electrochemical Properties of NaxMnO2 by a Wet Chemical Method

Layered Oxide Cathodes Promoted by Structure Modulation Technology for Sodium‐Ion Batteries

Internal and External Co‐Engineering of Stable Cathode Interface Improves Cycle Performance of Polymer Sodium Batteries

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