Microstructure and supercapacitive properties of buserite-type manganese oxide with a large basal spacing

Sun, Zhenjie; Shu, Dong; Chen, Hongyu; He, Chun; Tang, Shaoqing; Zhang, Jie

doi:10.1016/j.jpowsour.2012.05.087

Cited by 30 publications

(23 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It follows that if double-layer capacitance were the only operative mechanism, one would expect the capacitance for this material to be less than that of (for example) activated graphene by a factor of 100 (16). However, as noted above, intercalation capacitance can by far exceed double-layer capacitances calculated solely on the basis of a material's surface area (6,17).…”

mentioning

confidence: 93%

“…The specific structure of this material can best be described as a crystalline network with two-dimensional (2D) transport paths for ions between atomic layers; thus, even thick electrodes show excellent behavior (5). Another example is Mg-buserite electrodes, which exhibit good Na + ion intercalation capacitances but have poor electrical conductivities (6). Most materials for electrodes that can provide intercalation or surface redox capacitances are poor electronic conductors [e.g., graphene oxide or TiO 2 (7)] or are hydrophobic [e.g., graphene (8)].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

Lukatskaya

Mashtalir

Ren

et al. 2013

Science

3,711

2,672

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 93%

mentioning

confidence: 99%

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

Lukatskaya

Mashtalir

Ren

et al. 2013

Science

3,711

2,672

View full text Add to dashboard Cite

show abstract

“…Moreover, the cycling stability performance of the SSAS was displayed in Figure F. It is noted that a slight increase in capacitance was observed during the first 500 cycles, which was attributed to the activation process of electrode materials . The capacitance retention is 93.7% after 5000 cycles, revealing long‐term stability and remarkable charge/discharge reversibility.…”

Section: Resultsmentioning

confidence: 97%

“…It is noted that a slight increase in capacitance was observed during the first 500 cycles, which was attributed to the activation process of electrode materials. 62,63 The capacitance retention is 93.7% after 5000 cycles, revealing long-term stability and remarkable charge/discharge reversibility. Furthermore, the assembled solid-state supercapacitor can illuminate an LED lamp with a voltage of 1.6 V for 2 minutes (illustration in Figure 8F).…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Holey graphene/MnO ₂ nanosheets with open ion channels for high‐performance solid‐state asymmetric supercapacitors

Gao

Shu

et al. 2020

Int J Energy Res

Self Cite

View full text Add to dashboard Cite

Holey graphene/MnO2 (HG/MnO2) composites with open ion channels are synthesized by an electrostatic self‐assembly method. The HG with rich in‐plane nanopores is prepared via a mild etching reaction first, followed by modified with poly‐diallyldimethylammoniumchloride (PDDA) to transfer the surface charge of HG nanosheets from negative to positive, which are eventually assembled on the negatively charged MnO2 nanosheets via electrostatic attraction. As a result, the HG allows ions to pass through the graphene sheet, improving the ion transport channels. Besides, the electrostatic self‐assembly between HG and MnO2 enables the composite a high conductivity, providing effective electron transport pathways. The HG and MnO2 sheets are observed to be tightly bounded by the transmission electron microscope (TEM), and the HG content in the composites is determined to be 9.6% to 20% by the thermogravimetric (TG) test. The HG/MnO2‐2 electrode with the HG content of around 14.8% displays the large specific capacitance of 219.3 F g−1 at 0.5 A g−1 and the high rate capacity of 134.7 F g−1 at 10 A g−1. Furthermore, the as‐prepared solid‐state asymmetric supercapacitors (SSAS) achieve a wide stable operating voltage of 1.8 V, a high energy density of 16.8 Wh kg−1 at the power density of 224.6 W kg−1, and low capacitance degradation of only 6.3% after 5000 cycles.

show abstract

“…[16][17][18] The large interlayer gap in -MnO 2 favors the intercalation/deintercalation of electrolyte cations, thus makes -MnO 2 a suitable material for supercapacitors. 19 -MnO 2 have been synthesized through redox reactions at different conditions, for example, at room temperature, 20 21 via hydrothermal method, 22 23 using microwave-assisted method. 24 25 In the present work, amorphous MnO 2 was obtained in this typical synthesis.…”

Section: Articlementioning

confidence: 99%

MnO<SUB>2</SUB> as a Supercapacitor Electrode via Grinding Redox Reactions

Li¹,

Chen²,

Xue³

2013

mater focus

View full text Add to dashboard Cite

Manganese oxide (MnO 2 ) used for supercapacitors was fabricated via the redox reaction between KMnO 4 and CH 3 CHOHCH 3 using a simple grinding method. Amorphous MnO 2 products were obtained by grinding the reagents, and their crystal structures and morphologies were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The electrochemical measurements showed that this typical amorphous MnO 2 has a specific capacitance of 137 F g −1 based on the total mass of the products. The relative low capacitance can be attributed to the use of the total mass of the products in the calculation process. -MnO 2 were obtained after annealing this amorphous MnO 2 . The effects of different annealing temperatures on the structures and capacitive performances of the products were also investigated. The simple method used in this work is fast and inexpensive, and it can be easily introduced to the industry application.

show abstract

Microstructure and supercapacitive properties of buserite-type manganese oxide with a large basal spacing

Cited by 30 publications

References 48 publications

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

Holey graphene/MnO ₂ nanosheets with open ion channels for high‐performance solid‐state asymmetric supercapacitors

MnO<SUB>2</SUB> as a Supercapacitor Electrode via Grinding Redox Reactions

Contact Info

Product

Resources

About

Microstructure and supercapacitive properties of buserite-type manganese oxide with a large basal spacing

Cited by 30 publications

References 48 publications

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide

Holey graphene/MnO 2 nanosheets with open ion channels for high‐performance solid‐state asymmetric supercapacitors

MnO<SUB>2</SUB> as a Supercapacitor Electrode via Grinding Redox Reactions

Contact Info

Product

Resources

About

Holey graphene/MnO ₂ nanosheets with open ion channels for high‐performance solid‐state asymmetric supercapacitors