Optimized K+ pre-intercalation in layered manganese dioxide nanoflake arrays with high intercalation pseudocapacitance

Cao, Lin; Bao, Yu; Cheng, Tao; Zheng, Xin; Li, Xinghua; Li, Wei Long; Ren, Zhao Yu; Fan, Hai

doi:10.1016/j.ceramint.2017.08.006

Cited by 32 publications

(12 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…13 In our case, the low surface areas and the low rate capability (Fig. 5c) suggest that the contribution from pseudocapacitance is dominant, especially in R3 sample, which shows clear redox peaks at 0.42 and 0.65 V. 14,28 In fact, a similar redox peak observed in K-intercalated MnO 2 had been attributed to faradaic ion deintercalation of the electrolytic ions. 13 Such the intercalation/deintercalation is promoted by the expanded interlayer distance.…”

Section: Electrochemical Propertiesmentioning

confidence: 48%

“…It is known that the specic capacitance and electrochemical behaviors of pre-intercalated MnO 2 could be further improved by increasing the surface area or compositing with other functional materials. 13,14,16 Thus, this work has shown that Cs-MnO 2 , in addition to other alkaline-MnO 2 , could be an interesting candidate for supercapacitor electrodes.…”

Section: Electrochemical Propertiesmentioning

confidence: 84%

“…12 Additionally, Li-, Na-, and K-intercalated MnO 2 birnessite have been studied as candidates for supercapacitor electrodes. [13][14][15][16] Thus, Cs-MnO 2 could be another interesting candidate for the same applications. Yet, reports on electrochemical behaviors of Cs-MnO 2 birnessite are scarce.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Facile molten salt synthesis of Cs–MnO₂hollow microflowers for supercapacitor applications

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Electrochemical Propertiesmentioning

confidence: 48%

Section: Electrochemical Propertiesmentioning

confidence: 84%

See 1 more Smart Citation

Facile molten salt synthesis of Cs–MnO₂hollow microflowers for supercapacitor applications

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Cao et al. [ 108 ] reported that the amount of preintercalated K + could be adjusted by changing the amount of KMnO 4 (from 3 to 7 mmol) in synthesis process (Figure 8d). On one hand, introducing K + into MnO 2 structure resulted in an expansion of interlayer spacing, which enhanced the K + diffusion in MnO 2 with D K+ increasing from 2.66 × 10 −9 cm 2 s −1 (K 0.14 MnO 2 ) to 8.92 × 10 −9 cm 2 s −1 (K 0.19 MnO 2 ); on the other hand, once the amount of preintercalated K + reached a turning point, the interlayer spacing of K‐MnO 2 stopped increasing, and the excessive preintercalated K + would produce repulsive interaction with the inserted K + to depress its diffusion with D K+ decreasing from 8.92 × 10 −9 cm 2 s −1 (K 0.19 MnO 2 ) to 6.02 × 10 −9 cm 2 s −1 (K 0.215 MnO 2 ) (Figure 8e,f).…”

Section: Promoting Diffusion Kineticsmentioning

confidence: 99%

Preintercalation Strategy in Manganese Oxides for Electrochemical Energy Storage: Review and Prospects

et al. 2020

View full text Add to dashboard Cite

the past decades, some issues of MnO 2based cathodes still remain due to the low electronic conductivity, [19-21] low utilization of reversible discharge depth, [22,23] sluggish diffusion kinetics, [24-26] and poor structural stability upon cycling, [27-29] which restricts their practical application in the commercial secondary batteries. Taking the Zn-ion batteries as example, the MnO 2 cathode seriously suffer from the above issues, especially the sluggish Zn 2+ diffusion, [30] and structural collapse issue during H + /Zn 2+ intercalation/ extraction cycles. [31-33] Regarding these bottlenecks, researchers have strived to develop strategies that can realize optimizations in capacity, rate, and cycling properties of MnO 2 cathodes, such as surface coating, [34] metal-doping, [35] preintercalation, [36] etc. Among all the strategies, preintercalation strategy provides a basic and effective method for optimizing the structure and electrochemical performance of MnO 2-based cathodes. In recent years, the preintercalation strategy has attracted much attention as an effective approach to enhance the electrochemical performance of cathode materials, including vanadate, [37] manganese oxides, [23] layered LiCoO 2 , [38] etc. Several reviews and prospects have been conducted for MnO 2 materials. Some reviews have mentioned the electrochemical properties and correlated reaction mechanism of MnO 2 materials in aqueous Zn batteries, [29,39,40] and a review by Mai's group offers insights into the rational design of preintercalation electrodes in next-generation rechargeable batteries. [36] However, a review or prospect on the application and mechanism of the preintercalation strategy in MnO 2 materials for nextgeneration batteries is lacking. For MnO 2 electrode materials, many reports on improving the electrochemical properties of materials by applying preintercalation strategy have been emerged in the last 5 years (Table S1 in the Supporting Information). The main feature of the preintercalated MnO 2 materials is that some ions/molecules are preintercalated into the tunnel or interlayer hosts of MnO 2 materials prior to the battery cycling (or during synthesis process). These intercalated guest species, including ions, inorganic/organic molecules, as well as polymers, present electrostatic and physical interactions with the host framework and the inserted carrier ions via chemical bonding or coordination, presenting significant benefiting effect on the inherent structure of hosts and the transport kinetics of carrier ions. Generally, there are several Manganese oxides (MnO 2) are promising cathode materials for various kinds of battery applications, including Li-ion, Na-ion, Mg-ion, and Zn-ion batteries, etc., due to their low-cost and high-capacity. However, the practical application of MnO 2 cathodes has been restricted by some critical issues including low electronic conductivity, low utilization of discharge depth, sluggish diffusion kinetics, and structural instability upon cycling. Preintercalation of ions/molecules ...

show abstract

“…designed a continuous calcination‐rehydration treatment leading to conversion of CoAl‐CO 3 LDH to CoAl‐OH LDH to improve capacitance reservation, in which OH − anions were stored in the interlayer space of LDHs to shorten the anion diffusion distance dramatically . Such ion storage or ion pre‐intercalation had been demonstrated as an effective way to increase the electrochemical performance of layered‐structure compounds . The anion exchange of CO 3 2− by OH − is a spontaneous reaction in concentrated alkaline solution.…”

Section: Introductionmentioning

confidence: 99%

Anion Exchange of Ni–Co Layered Double Hydroxide (LDH) Nanoarrays for a High‐Capacitance Supercapacitor Electrode: A Comparison of Alkali Anion Exchange and Sulfuration

Zou

Guo

Liu

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

A facile and new anion exchange process is presented, which involves the conversion of NiCo‐CO3 layered double hydroxide (LDH) nanosheet arrays in an alkaline solution. The anion exchange between CO32− and OH− results in the construction of a reservoir for OH− anions, and the decoration of thin nanoflakes on the surface of nanosheets effectively enlarges the surface area of NiCo LDH nanoarrays. The capacitance of the as‐soaked NiCo LDH nanoarrays electrode increases from 1.78 F cm−2 (684 F g−1) to 6.22 F cm−2 (2391 F g−1) at 2 mA cm−2 after soaking for 12 h. Moreover, the soaked NiCo‐OH LDH electrode exhibits an enhanced rate capacity, high coulombic efficiency, and good cycling stability compared with the Ni–Co‐S nanosheet electrode synthesized through a hydrothermal sulfuration process. The as‐assembled all‐solid‐state NiCo LDH//active carbon asymmetric supercapacitor shows a maximum energy density of 83.4 W h kg−1 at a power density of 1066 W kg−1.

show abstract

Optimized K+ pre-intercalation in layered manganese dioxide nanoflake arrays with high intercalation pseudocapacitance

Cited by 32 publications

References 46 publications

Facile molten salt synthesis of Cs–MnO₂hollow microflowers for supercapacitor applications

Facile molten salt synthesis of Cs–MnO₂hollow microflowers for supercapacitor applications

Preintercalation Strategy in Manganese Oxides for Electrochemical Energy Storage: Review and Prospects

Anion Exchange of Ni–Co Layered Double Hydroxide (LDH) Nanoarrays for a High‐Capacitance Supercapacitor Electrode: A Comparison of Alkali Anion Exchange and Sulfuration

Contact Info

Product

Resources

About

Optimized K+ pre-intercalation in layered manganese dioxide nanoflake arrays with high intercalation pseudocapacitance

Cited by 32 publications

References 46 publications

Facile molten salt synthesis of Cs–MnO2hollow microflowers for supercapacitor applications

Facile molten salt synthesis of Cs–MnO2hollow microflowers for supercapacitor applications

Preintercalation Strategy in Manganese Oxides for Electrochemical Energy Storage: Review and Prospects

Anion Exchange of Ni–Co Layered Double Hydroxide (LDH) Nanoarrays for a High‐Capacitance Supercapacitor Electrode: A Comparison of Alkali Anion Exchange and Sulfuration

Contact Info

Product

Resources

About

Facile molten salt synthesis of Cs–MnO₂hollow microflowers for supercapacitor applications

Facile molten salt synthesis of Cs–MnO₂hollow microflowers for supercapacitor applications