Carbonized polydopamine nanoparticle reinforced graphene films with superior thermal conductivity

Zou, Rui; Liu, Feng; Hu, Ning; Hu, Ning; Jiang, Xiaoping; Xu, Chaohe; Fu, Shao‐Yun; Li, Yuanqing; Zhou, Xiaoyuan; Chen, Yan

doi:10.1016/j.carbon.2019.04.038

Cited by 62 publications

(30 citation statements)

References 51 publications

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“…During the measurement, each graphite film was automatically measured 3 times and an average value was obtained. The error for α is less than 1) according to the literature [36].…”

Section: Measurement Of Thermal Conductivitymentioning

confidence: 66%

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Highly Thermal Conductive Graphite Films Derived from the Graphitization of Chemically Imidized Polyimide Films

Sun

Wang

et al. 2022

Nanomaterials

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With the large-scale application and high-speed operation of electronic equipment, the thermal diffusion problem presents an increasing requirement for effective heat dissipation materials. Herein, high thermal conductive graphite films were fabricated via the graphitization of polyimide (PI) films with different amounts of chemical catalytic reagent. The results showed that chemically imidized PI (CIPI) films exhibit a higher tensile strength, thermal stability, and imidization degree than that of purely thermally imidized PI (TIPI) films. The graphite films derived from CIPI films present a more complete crystal orientation and ordered arrangement. With only 0.72% chemical catalytic reagent, the graphitized CIPI film achieved a high thermal conductivity of 1767 W·m−1·K−1, which is much higher than that of graphited TIPI film (1331 W·m−1·K−1), with an increase of 32.8%. The high thermal conductivity is attributed to the large in-plane crystallite size and high crystal integrity. It is believed that the chemical imidization method prioritizes the preparation of high-quality PI films and helps graphite films achieve an excellent performance.

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“…During the measurement, each graphite film was automatically measured 3 times and an average value was obtained. The error for α is less than 1) according to the literature [36].…”

Section: Measurement Of Thermal Conductivitymentioning

confidence: 66%

“…The error for α is les than ± 15 mm 2 •s −1 . The thermal conductivity (λ, W•m −1 •K −1 ) is calculated by Equation (1 according to the literature [36].…”

Section: Measurement Of Thermal Conductivitymentioning

confidence: 99%

Highly Thermal Conductive Graphite Films Derived from the Graphitization of Chemically Imidized Polyimide Films

Sun

Wang

et al. 2022

Nanomaterials

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“…For the C 1s spectrum ( Figure 6 b), the main peak was well fitted and deconvoluted into three peaks, which are attributed to O–C=O (288.9 eV), C–N (285.7 eV), and C–C (284.8 eV). 64 , 65 The small area of O–C=O illustrates that most oxygen-containing groups were removed during heat treatment, and the presence of C–N suggests the doping of nitrogen due to the coating of cpDOPA. To determine the type of doped nitrogen in this material, we also did peak fitting for the N 1s spectrum.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 6 c, the three peaks are assigned to graphitic nitrogen (403.6 eV), pyrrolic nitrogen (400.4 eV), and pyridinic nitrogen (397.9 eV). 64 , 65 XRD profiles are plotted in Figure 6 d. The peaks at 28.4, 47.3, 56.1, and 69.1° are assigned to (111), (220), (311), and (400) lattice planes of crystalline silicon, respectively. A broad and nearly undiscernible peak around ∼27° in the XRD pattern of crGO–Si indicates that the rGO shell indicates little to no restacking of the rGO.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Cycle Stability of Crumpled Graphene-Encapsulated Silicon Anodes via Polydopamine Sealing

She

Gad

et al. 2021

ACS Omega

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Despite silicon being a promising candidate for next-generation lithium-ion battery anodes, self-pulverization and the formation of an unstable solid electrolyte interface, caused by the large volume expansion during lithiation/delithiation, have slowed its commercialization. In this work, we expand on a controllable approach to wrap silicon nanoparticles in a crumpled graphene shell by sealing this shell with a polydopamine-based coating. This provides improved structural stability to buffer the volume change of Si, as demonstrated by a remarkable cycle life, with anodes exhibiting a capacity of 1038 mA h/g after 200 cycles at 1 A/g. The resulting composite displays a high capacity of 1672 mA h/g at 0.1 A/g and can still retain 58% when the current density increases to 4 A/g. A systematic investigation of the impact of spray-drying parameters on the crumpled graphene morphology and its impact on battery performance is also provided.

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“…To achieve high thermal conductivity, carbonization through a high-temperature annealing approach was reported [23]. It was reported that the carbonized polydopamine nanoparticle reinforced graphene films exhibited high thermal conductivity of 1584 W m −1 K −1 through the carbonized process, as shown in Figure 1c [24]. Vacuum filtration, by which different thickness films can be obtained through different concentration optimizations, is easy to operate.…”

Section: Vacuum Filtrationmentioning

confidence: 99%

Graphene-Based Films: Fabrication, Interfacial Modification, and Applications

et al. 2021

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Graphene-based film attracts tremendous interest in many potential applications due to its excellent thermal, electrical, and mechanical properties. This review focused on a critical analysis of fabrication, processing methodology, the interfacial modification approach, and the applications of this novel and new class material. Strong attention was paid to the preparation strategy and interfacial modification approach to improve its mechanical and thermal properties. The overview also discussed the challenges and opportunities regarding its industrial production and the current status of the commercialization. This review showed that blade coating technology is an effective method for industrial mass-produced graphene film with controllable thickness. The synergistic effect of different interface interactions can effectively improve the mechanical properties of graphene-based film. At present, the application of graphene-based film on mobile phones has become an interesting example of the use of graphene. Looking for more application cases is of great significance for the development of graphene-based technology.

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Carbonized polydopamine nanoparticle reinforced graphene films with superior thermal conductivity

Cited by 62 publications

References 51 publications

Highly Thermal Conductive Graphite Films Derived from the Graphitization of Chemically Imidized Polyimide Films

Highly Thermal Conductive Graphite Films Derived from the Graphitization of Chemically Imidized Polyimide Films

Enhanced Cycle Stability of Crumpled Graphene-Encapsulated Silicon Anodes via Polydopamine Sealing

Graphene-Based Films: Fabrication, Interfacial Modification, and Applications

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