A graphene modified anode to improve the performance of microbial fuel cells

Zhang, Yezhen; Mo, Guangquan; Li, Xuwen; Zhang, Wei-De; Zhang, Jiaqi; Ye, Jianshan; Huang, Xiaodan; Yu, Chengzhong

doi:10.1016/j.jpowsour.2011.02.067

Cited by 345 publications

(166 citation statements)

References 36 publications

Supporting

Mentioning

163

Contrasting

Unclassified

Order By: Relevance

“…12 Recently, graphene oxide has also been introduced as a blended anode material in carbon cloth [14][15][16] and stainless steel. 17 We show here, for the first time in any type of MFC, that anodes can be composed of pure multi-layer graphene rather than a graphene oxide hybrid. To produce these anodes, multi-layer graphene was synthesized via the decomposition of methane over copper using atmospheric pressure chemical vapor deposition.…”

Section: Multi-layer Graphene Anodementioning

confidence: 76%

“…24 Specifically, cyclic voltammogram plots and electrical impedance spectroscopy were used to characterize a graphene biofilm to show that graphene improved the kinetics of electron transfer between the cell surface proteins and the electrode, leading to an overall improvement in electron transfer kinetics. 16,17,24 An analysis of energy loss was performed to determine the specific contributions of the various components of the device to the total internal resistance of the system. The electrolyte resistance was nearly 180 O; therefore, using the maximum power, a current of 1.4 mA results in a loss of approximately 0.252 mV.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Energy harvesting from organic liquids in micro-sized microbial fuel cells

et al. 2014

View full text Add to dashboard Cite

Micro-sized microbial fuel cells (MFCs) are miniature energy harvesters that use bacteria to convert biomass from liquids into usable power. The key challenge is transitioning laboratory test beds into devices capable of producing high power using readily available fuel sources. Here, we present a pragmatic step toward advancing MFC applications through the fabrication of a uniquely mobile and inexpensive micro-sized device that can be fueled with human saliva. The 25-ll MFC was fabricated with graphene, a two-dimensional atomic crystal-structured material, as an anode for efficient current generation and with an air cathode for enabling the use of the oxygen present in air, making its operation completely mobile and free of the need for laboratory chemicals. With saliva as a fuel, the device produced higher current densities (1190 A m À3 ) than any previous aircathode micro-sized MFCs. The use of the graphene anode generated 40 times more power than that possible using a carbon cloth anode. Additional tests were performed using acetate, a conventional organic material, at high organic loadings that were comparable to those in saliva, and the results demonstrated a linear relationship between the organic loading and current. These findings open the door to saliva-powered applications of this fuel cell technology for Lab-on-a-Chip devices or portable point-of-care diagnostic devices.

show abstract

Section: Multi-layer Graphene Anodementioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Energy harvesting from organic liquids in micro-sized microbial fuel cells

et al. 2014

View full text Add to dashboard Cite

show abstract

“…The power generation capacity of GTi was therefore markedly improved compared with UTi. This change could accelerate the electron transfer between bacteria and electrodes to optimize the electrode architecture [29][30].…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…In terms of the entire operating cycle, the duration of GPTi (37.5 h) was 10 h longer than that of UTi (27 h). This is because the G/PANI composite not only possesses the large specific surface area and high conductivity of graphene, but also inherits the excellent electrochemical property and high charge-storage capability of polyaniline [12,30].…”

Section: G/pani Modification Of Cathodementioning

confidence: 99%

“…, respectively; the latter was 1.18-fold that of the former. The possible reason is that graphene has a significant specific surface area; thus, graphene modification greatly improved the specific surface area of the anode and provided more area for the attachment of microorganisms in the anode chamber, further accelerating the generation and transfer of electrons [30][31]. Therefore, MFCs with graphene-modified anodes were improved in power generation compared to the unmodified control.…”

Section: G/pani Modification Of Cathodementioning

confidence: 99%

See 1 more Smart Citation

Using Graphene/Polyaniline-Modified Electrodes Enhance the Performance of Two-Chambered Microbial Fuel Cells

Yang¹,

Wang²,

Zhou³

et al. 2017

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The development of highly efficient modified electrodes is critical for enhancing the power output of microbial fuel cells (MFCs). In this study, different titanium electrodes were modified with functionalized graphene, polyaniline, and their composite (G/PANI) for use in two-chambered MFCs. The results showed that graphene, polyaniline, and G/PANI modification of the cathode improved the maximum power density of MFCs by 74%, 40%, and 126%, respectively, compared with the unmodified control. Among the three materials, G/PANI modification of the anode resulted in the highest open-circuit voltage of MFCs (0.71 V) and recorded the longest operating time for three consecutive cycles (110 h). G/PANI was superior to the other two materials in terms of power generation and it also extended the duration of the operating cycle of MFCs. G/PANI modification of both the cathode and anode improved the maximum power density of MFCs to 124.84 mW•m -2 ; this value was 24.8% and 18.9% higher than those obtained by simple modification of the cathode and the anode, respectively. The duration of the operating cycle of MFCs was also markedly extended to 35 h after G/PANI modification of both the cathode and anode. SEM results revealed that the increase in power generation of MFCs with G/PANI-modified electrodes could be attributed to the high surface area of electrodes and the large number of bacteria attached to electrodes. These results have demonstrated that the G/PANI composite can be effective materials for modifying electrodes and improving power generation in two-chambered MFCs.

show abstract

Microbial Fuel Cell for Biomass Energy Conversion

Karthikeyan

Xuan

Leung

2015

Handbook of Clean Energy Systems

View full text Add to dashboard Cite

The vision of producing sustainable and renewable bioenergy is to contribute reducing the current global warming impact. It is well known that microorganisms can produce fuels, such as ethanol, butanol, methane, and hydrogen. Alternatively, microbes can produce electricity by means of microbial fuel cell (MFC). The recent development in energy biology has demonstrated the potential of MFC for commercial applications in converting renewable biomass and organic waste into electricity. The biomass sources are highly desirable because they are “carbon‐neutral.” Electrical energy can be extracted from organic waste matter and renewable biomass by microbial degradation. The major challenge of using microbial fuel cell is to increase power density for most of the envisaged applications, such as power monitoring electronic devices, light source of battery charger in off‐grid areas. A wide scope lies ahead in the scaling up of MFC for large‐scale conversion of organic waste and biomass into electricity for powering vehicles, mobile electronic devices or buildings. The use of waste organic from biomass is environment‐friendly and regarded as a renewable energy source. This article gives an overview of microbial fuel cell that covers the bioelectrochemical mechanisms, system and components, characterization, performance, and applications.

show abstract

A graphene modified anode to improve the performance of microbial fuel cells

Cited by 345 publications

References 36 publications

Energy harvesting from organic liquids in micro-sized microbial fuel cells

Energy harvesting from organic liquids in micro-sized microbial fuel cells

Using Graphene/Polyaniline-Modified Electrodes Enhance the Performance of Two-Chambered Microbial Fuel Cells

Microbial Fuel Cell for Biomass Energy Conversion

Contact Info

Product

Resources

About