Activated Carbon from Biomass Transfer for High‐Energy Density Lithium‐Ion Supercapacitors

Li, Bing; Dai, Fang; Xiao, Qiangfeng; Yang, Li; Shen, Jingmei; Zhang, Cunman; Cai, Mei

doi:10.1002/aenm.201600802

Cited by 239 publications

(135 citation statements)

References 49 publications

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“…6d, the specific capacitance of CS-DAC-C (derived from the GCD curves) was up to 242 F g -1 at a current density of 1 A g -1 , which was much higher than those obtained for DAC-C (181 F g -1 ) and LC-DAC-C (180 F g -1 ), and comparable to results previously reported for cellulose-based carbon electrodes (Chen et al 2014a;Jiang et al 2015Jiang et al , 2016Li et al 2016c). The higher capacitance of CS-DAC-C compared to LC-DAC-C was probably the result of the higher SSA of the former (Li et al 2016a, b;Wang et al 2017). The fact that the DAC-C electrode, which had the highest SSA of the samples under study, exhibited a lower capacity than CS-DAC-C indicates that the doped heteroatoms contributed more to the capacitive behavior than the SSA.…”

Section: Charge Storage Propertiessupporting

confidence: 66%

Carbonized cellulose beads for efficient capacitive energy storage

et al. 2018

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Natural biomaterials, including polysaccharides and amino acids, provide a sustainable source of functional carbon materials for electric energy storage applications. We present a one-pot reductive amination process to functionalize 2,3-dialdehyde cellulose (DAC) beads with chitosan and L-cysteine to provide single (N)-and dual (N/S)-doped materials. The functionalization enables the physicochemical properties of the materials to be tailored and can provide carbon precursors with heteroatom doping suitable for energy storage applications. Scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis were used to characterize the changes to the beads after functionalization and carbonization. The results of X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy verified that the doping was effective, while the nitrogen sorption isotherms and pore-size distributions of the carbonized beads showed the effects of doping with different hierarchical porosities. In the electrochemical experiments, three kinds of carbon beads [pyrolyzed from DAC, chitosan-crosslinked DAC (CS-DAC) and L-cysteinefunctionalized DAC] were used as electrode materials. Electrodes of carbonized CS-DAC beads had a specific capacitance of up to 242 F g -1 at a current density of 1 A g -1 . These electrodes maintained a capacitance retention of 91.5% after 1000 charge/ discharge cycles, suggesting excellent cycling stability. The results indicate that reductive amination of DAC is an effective route for heteroatom doping of carbon materials to be used as electrode active materials for energy storage.

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Section: Charge Storage Propertiessupporting

confidence: 66%

Carbonized cellulose beads for efficient capacitive energy storage

et al. 2018

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“…[32] The Raman spectra The intensity ratio of D and G band (I D /I G ) reflects the graphitic order of LS ACs. [40,41] The values of I D /I G of all samples are close to 1.00, unrelated with the KOH ratios, suggesting the highly disordered characteristic of LS ACs with low graphitization degree.…”

mentioning

confidence: 83%

Fabricating an Aqueous Symmetric Supercapacitor with a Stable High Working Voltage of 2 V by Using an Alkaline–Acidic Electrolyte

Wu²,

Wang

et al. 2018

Advanced Science

134

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Aqueous symmetric carbon‐based supercapacitors (CSCs) are always the research focus for energy storage devices because of the virtue of low cost, inherent safety, and encouraging electrochemical stability. As is well‐known, so far most aqueous symmetric CSCs are subjected to low energy densities. Here, a symmetric supercapacitor comprising electrodes from biomass‐derived activated carbon and alkaline–acidic electrolyte is reported. This aqueous symmetric CSC demonstrates exceptional electrochemical performance with high stable working voltage of 2 V and attractive cycling stability of no capacitance loss over 10 000 cycles. Impressively, it shows a remarkable energy density of 36.9 W h kg−1 at 248 W kg−1 based on the total mass of the active materials, which is much higher than traditional aqueous symmetric CSCs, and a power density of 4083 W kg−1 with an energy density of 8.8 W h kg−1. The use of stable alkaline–acidic electrolyte provides an innovative technique to enhance the energy density of aqueous supercapacitors.

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“…The capacitance decreased a lot from 321 F/g in sample AK to 228 F/g in sample AKO, which because the sample AKO presented numerous of CO 2 ‐evolving groups (eg, carboxyl acids). On the contrary, Jin et al obtained an opposite conclusion that the resistance of the HPCs derived from dried grains with soluble decreased significantly after HNO 3 oxidation treatment because of faster forming of electrical double layers, similar to the results with Li et al One of the possible reasons was the increase in the volume of the mesopores . In other words, oxygen‐containing functional groups have both positive and negative effects on the capacitance of carbon‐based electrode.…”

Section: Analysis and Discussionmentioning

confidence: 62%

The synthesis and performance analysis of various biomass‐based carbon materials for electric double‐layer capacitors: A review

Lin

et al. 2019

Int J Energy Res

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Summary Biomass is one of the most promising clean energy sources. The porous carbon materials prepared by biomass as electrode materials of electric double‐layer capacitors (EDLCs) are easily available at a low price, which would greatly reduce the cost of the production. However, carbon materials made with biomass generally have many disadvantages such as low specific surface area (SSA), poor pore size structure, and difficulty to control the pore diameter, which results in the poor EDLC performance. In this paper, the prime purpose is to expose the recent progress of biomass carbon in the fields of electrode materials of EDLC. The review provides a comprehensive literature review that is focused on EDLC electrodes derived from biochar of the evidence of 181 publications published over a period of 30 years from 1989 to 2019. Various carbon materials derived from different biomass for electrode of EDLC are discussed. The most promising methods for the preparation of several biomass carbons are described in detail. Some factors such as SSA, pore size structure, surface functional groups, and electrolyte are further analyzed to discuss the effects on the electrochemical performance of the EDLC. Notably, current deficiencies and possible solutions of preparation methods of biomass carbon as electrode materials are outlined. And the future research trends in this field are prospected.

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Activated Carbon from Biomass Transfer for High‐Energy Density Lithium‐Ion Supercapacitors

Cited by 239 publications

References 49 publications

Carbonized cellulose beads for efficient capacitive energy storage

Carbonized cellulose beads for efficient capacitive energy storage

Fabricating an Aqueous Symmetric Supercapacitor with a Stable High Working Voltage of 2 V by Using an Alkaline–Acidic Electrolyte

The synthesis and performance analysis of various biomass‐based carbon materials for electric double‐layer capacitors: A review

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