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Kuruahmet D, Guler A, Yildirim S, Singil MM, Güngör H, Uzun E, Alkan E, Guler MO, Akbulut H. Cobalt-Free Layered LiNi 0.8Mn 0.15Al 0.05O 2/Graphene Aerogel Composite Electrode for Next-Generation Li-Ion Batteries. ACS OMEGA 2023; 8:15124-15140. [PMID: 37151515 PMCID: PMC10157666 DOI: 10.1021/acsomega.2c08281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/29/2023] [Indexed: 05/09/2023]
Abstract
In this work, we introduce LiNi0.8Mn0.15Al0.05O2 (NMA), which is cobalt-free and has a high nickel content, and a conductive composite material to NMA by supporting it with a three-dimensional (3D) graphene aerogel (GA). With an easy freeze-drying approach, NMA nanoparticles are properly dispersed on graphene sheets, and GA creates a strong and conductive framework, significantly improving the structure and conductivity. The structure of the pure NMA and NMA/graphene aerogel (NMA/GA) composite was investigated by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). XRD and FE-SEM analyses clearly indicated that ultrapure NMA structures are homogeneously dispersed among the GAs. In addition, the composite structure was examined using transmission electron microscopy (TEM) to determine the dispersion mechanisms. The electrochemical cycling performance of the pure NMA and NMA/GA composite was evaluated by rate capacitance, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The synthesized NMA/GA was able to provide 89.81% specific capacity retention after the 500th cycle at C/2. The average charge/discharge rates of the obtained cathode show good electrochemical results and exhibit capacities of 190.2,186.3, 185.2, 176.2, 161.2,142.6, and 188.5 mAh g-1 at C/20, C/10, C/5, C, 3C, 5C, and C/20, respectively. EIS data showed an improvement in the impedance of the composite containing GA. According to the results of the electrochemical tests, NMA nanoparticles formed a conductive network with its porous structure thanks to GA, formed a protective layer on the surface, prevented the side reactions between the cathode and the electrolyte, decreased the impedance of the cathode, and increased the redox kinetics. In addition, the changes in the structure were investigated in the NMA/GA composite cathode by XRD, FE-SEM, and Raman analyses at the end of the 50th, 250th, and 500th cycles. In summary, the NMA/GA cathode is expected to play an important role in lithium-ion batteries (LIBs) by taking advantage of its easy synthesis and excellent cycle stability.
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Affiliation(s)
- Deniz Kuruahmet
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Aslihan Guler
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Sidika Yildirim
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
- Dr.
Engin Pak Cumayeri Vacational School, Duzce
University, 81700 Cumayeri, Duzce, Turkey
| | - Mustafa Mahmut Singil
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Hatice Güngör
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Esma Uzun
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Engin Alkan
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Mehmet Oguz Guler
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
| | - Hatem Akbulut
- Engineering
Faculty, Department of Metallurgical & Materials Engineering, Sakarya University, Esentepe Campus, 54187 Adapazari Sakarya, Turkey
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Yang L, Li Y, Zhang Y, Fan D, Pang X, Wei Q, Du B. 3D Nanostructured Palladium-Functionalized Graphene-Aerogel-Supported Fe 3O 4 for Enhanced Ru(bpy) 32+-Based Electrochemiluminescent Immunosensing of Prostate Specific Antigen. ACS APPLIED MATERIALS & INTERFACES 2017; 9:35260-35267. [PMID: 28925683 DOI: 10.1021/acsami.7b11458] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We developed a novel Ru(bpy)32+-based electrochemiluminescence (ECL) immunosensor utilizing palladium nanoparticle (Pd NP)-functionalized graphene-aerogel-supported Fe3O4 (FGA-Pd) for real-sample analysis of prostate specific antigen (PSA). 3D nanostructured FGA-Pd, as a novel ECL carrier, was prepared by in situ reduction. Large amounts of Ru(bpy)32+ could combine with FGA-Pd via electrostatic interaction to establish a brand-new ECL emitter (Ru@FGA-Pd) for improving ECL efficiency. The obtained Ru@FGA-Pd composite was utilized to label the secondary antibody, which generated strong ECL signals with tripropylamine (TPrA) as a coreactant. Furthermore, we demonstrated that the participation of Pd NPs endowed FGA with favorable electrocatalytic ability in the luminescence process to produce more excited state [Ru(bpy)32+]* for realizing desirable signal amplification. In addition, the primary antibody was captured by gold nanoparticle (Au NP)-functionalized Fe2O3 nanodendrites (Au-FONDs), which possessed good electrical conductivity and favorable biocompatibility. Under optimum conditions, the fabricated sandwich-type ECL immunosensor showed a sensitive response to PSA with a low detection limit of 0.056 pg/mL (S/N = 3) and a calibration range of 0.0001-50 ng/mL. Featuring favorable selectivity, stability, and repeatability, the proposed immunosensor is expected to blaze a novel trail for the real sample detection of PSA and other biomarkers.
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Affiliation(s)
- Lei Yang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
| | - Yueyuan Li
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
| | - Yong Zhang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
| | - Dawei Fan
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
| | - Xuehui Pang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
| | - Bin Du
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, PR China
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Bagheri S, Termehyousefi A, Mansouri N, Amani Babadi A, Abd Karim MS, Adib Kadri N. Carbon-Based Nanobiohybrid Thin Film for Amperometric Glucose Sensing. ACS Biomater Sci Eng 2017; 3:2059-2063. [PMID: 33440559 DOI: 10.1021/acsbiomaterials.7b00325] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This pioneering study involved the fabrication of a new class of nanohybrid-based electrochemical glucose biosensor. First, three-dimensional (3D) graphene was fabricated as a platform of multiwalled carbon nanotube (MWCNT). Then, it was used to immobilize glucose oxidase (GOD) on nanohybrid thin film via the entrapment technique. The modified glucose biosensor indicated excellent biocatalytic activity toward the glucose measurment with a sensitivity of up to 49.58 μA mM-1 cm-2 and a wide linear dynamic range up to 16 mM. The fabricated biosensor shows an excellent stability of 87.8%, with its current diminishing after 3 months. This facile and simple electrochemical method for glucose monitoring using a modified glassy carbon electrode (GCE) by 3DG-MWCNT-GOD could open new avenues in producing of a inexpensive and sensitive glucose nanobiosensors.
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Affiliation(s)
| | | | - Negar Mansouri
- School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, South Australia 5005 Australia
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