A facile method to hunt for durable high-rate capability Na0.44MnO2

Ju, Xiaokang; Huang, Hui; Zheng, Hongfei; Pan, Deng; Li, Shengyang; Qu, Baihua; Wang, Taihong

doi:10.1016/j.jpowsour.2018.05.086

Cited by 32 publications

(22 citation statements)

References 49 publications

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“…This result further confirms that the crystal grows along the [001] orientation ( c ‐axis), to form the nanorod structure that provides excellent Na + diffusion channels. [ 15,16 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 12 ] Although the unique tunnel structure prevents the formation of undesirable multiphases during sodiation and desodiation, poor cycle stability and low capacity at high currents, caused by the Jahn–Teller (JT) distortion of Mn 3+ in MnO 6 , hinder the commercial application of Na 0.44 MnO 2 . [ 13,14 ] In order to address these limitations and improve its electrochemical kinetics, research has focused on morphological design, [ 15,16 ] protective coatings, [ 17,18 ] and cation doping. [ 19,20 ] Although the cycling stabilities of these modified Na 0.44 MnO 2 materials show varying degrees of improvement, the high‐rate capability and full‐cell electrochemical performance remain unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

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Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Liang

Kim

Jung

et al. 2020

Adv Funct Materials

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Sodium manganese oxides as promising cathode materials for sodium‐ion batteries (SIBs) have attracted interest owing to their abundant resources and potential low cost. However, their practical application is hindered due to the manganese disproportionation associated with Mn3+, resulting in rapid capacity decline and poor rate capability. Herein, a Li‐substituted, tunnel/spinel heterostructured cathode is successfully synthesized for addressing these limitations. The Li dopant acts as a pillar inhibiting unfavorable multiphase transformation, improving the structural reversibility, and sodium storage performance of the cathode. Meanwhile, the tunnel/spinel heterostructure provides 3D Na+ diffusion channels to effectively enhance the redox reaction kinetics. The optimized [Na0.396Li0.044][Mn0.97Li0.03]O2 composite delivers an excellent rate performance with a reversible capacity of 97.0 mA h g–1 at 15 C, corresponding to 82.5% of the capacity at 0.1 C, and a promising cycling stability over 1200 cycles with remarkable capacity retention of 81.0% at 10 C. Moreover, by combining with hard carbon anodes, the full cell demonstrates a high specific capacity and favorable cyclability. After 200 cycles, the cell provides 105.0 mA h g–1 at 1 C, demonstrating the potential of the cathode for practical applications. This strategy might apply to other sodium‐deficient cathode materials and inform their strategic design.

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“…This result further confirms that the crystal grows along the [001] orientation ( c ‐axis), to form the nanorod structure that provides excellent Na + diffusion channels. [ 15,16 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Liang

Kim

Jung

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…Most diffraction peaks of the as‐prepared NMO electrode shift to a higher angle after charge. This is due to lattice contraction when the sodium ions were extracted during charge, and meanwhile, the peak related to the (350) plane is divided into two new peaks assigned to (350) and (0100) planes . After discharge, the XRD peaks move back on account of the reinsertion of sodium ions.…”

Section: Resultsmentioning

confidence: 99%

Polypyrrole as a Novel Chloride‐Storage Electrode for Seawater Desalination

et al. 2019

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The desalination battery is regarded as a promising high‐efficiency technology for seawater desalination on account of the reversible salt‐ion storage in the bulk of the battery electrodes. Herein, polypyrrole is used as a new electrode to store chloride ions in seawater desalination. The as‐prepared polypyrrole composite electrode shows good electrochemical reversibility in chloride‐ion storage and removal in the aqueous NaCl electrolyte. When this chloride electrode is incorporated with a sodium electrode of sodium manganese oxide, a desalination battery that can capture chloride and sodium ions from the electrolyte through the electrochemical redox reactions is obtained. A stable and reversible capacity of 40 mAh g−1 of the desalination battery is achieved after 200 cycles.

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“…Actually, apart from the phase composition, the particle size also has a great impact on the electrochemical performance of the cathode materials in SIBs . Qu et al . broke the prepared rod‐like structure Na 0.44 MnO 2 cathode with a cell grinder, so as to shorten the sodium‐ion diffusion paths and be conducive to contact with electrolyte for high rate performance and durable cycle stability cathode materials.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Component Ratio and Particle Size Optimization for High‐Performance and High Tap Density P2/P3 Composite Cathode of Sodium‐Ion Batteries

et al. 2019

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The composite structure materials in sodium-ion batteries (SIBs) have received increasing attentions due to the synergistic effect. P2/P3 composite cathode with the advantages of high reversible capacity and superior reaction kinetics was regarded as one of the promising cathodes for SIBs. Crystal phase component ratio and particle morphology of hybrid structures are closely related with the electrochemical performance, especially the energy density. Herein, P2/P3 hybrid structure materials Na 0.6 Mn 1-x Ni x O 2 were synthesized by co-precipitation method. Furthermore, the component ratio and particle size are tuned and realized via simple Ni 2 + content optimization. The targeted sample Na 0.6 Mn 0.75 Ni 0.25 O 2 shows high tap density over 1.2 g cm À 3 and excellent electrical properties with an initial capacity of 101.36 mA h g À 1 at 0.2 C, corresponding to a high volumetric energy density of 512 Wh L À 1 based on the cathode active material. Moreover, the long-term cycling capacity retention can reach 68 % at 1 C after 500 cycles. The present study develops a promising cathode of SIBs that maybe applied in low-speed electric vehicles. And the simultaneous optimization design represents a potential route for the regulation of composite structures to obtain high performance SIBs.

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A facile method to hunt for durable high-rate capability Na0.44MnO2

Cited by 32 publications

References 49 publications

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Polypyrrole as a Novel Chloride‐Storage Electrode for Seawater Desalination

Simultaneous Component Ratio and Particle Size Optimization for High‐Performance and High Tap Density P2/P3 Composite Cathode of Sodium‐Ion Batteries

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