Transport Characteristics of Interfacial Charge in SiC Semiconductor–Epoxy Resin Packaging Materials

Chen, Chi; Li, Jiaxing; Wang, Xia; Wu, Kai; Cheng, Chuanbing; Wang, Chuang; Fu, Yuwei

doi:10.3389/fchem.2022.879438

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…The maximum energy barrier of OER is transformed from * OH to * O as the RDS, which is consistent with the previous predictions results. [ 44 ] (Ru 2 Fe 2 Co 6 )OOH has an smallest energy barrier of 1.75 eV than (Ru 1 Fe 2 Co 7 )OOH of 1.82 eV and (Ru 3 Fe 2 Co 5 )OOH of 1.87 eV, proving the improved activity of (Ru 2 Fe 2 Co 6 )OOH. The overpotential of the OER by applying the equilibrium potential of 1.23 V was estimated to be 0.59, 0.52, and 0.64 eV for (Ru 1 Fe 2 Co 7 ) OOH, (Ru 2 Fe 2 Co 6 )OOH and (Ru 3 Fe 2 Co 5 )OOH, respectively (Figure 6f).…”

Section: Resultsmentioning

confidence: 89%

“…41‐1471), which suggests that these catalysts are CoS 2 ‐based material with the content of Ru/Fe components. [ 44 ] Due to the difference in the atomic radius of Ru, Fe, and Co, the peak in the (2 0 0) plane of (Ru 1‐4x Fe x Co 3x )S 2 undergoes a large angular shift, indicating an effective substitution of Ru/Fe for Co into CoS 2 . [ 45 ] The weak peak at 26° corresponds to the graphitic carbon structure (0 0 2), indicating that carbon remains in all samples after pyrolysis.…”

Section: Resultsmentioning

confidence: 99%

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Controllable Electronic Transfer Tailoring d‐band Center via Cobalt–Oxygen‐Bridged Ru/Fe Dual‐sites for Boosted Oxygen Evolution

Zhu,

Zhang,

Chen

et al. 2024

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Rational tailoring of the electronic structure at the defined active center of reconstructed metal (oxy)hydroxides (MOOH) during oxygen evolution reaction (OER) remains a challenge. With the guidance of density functional theory (DFT), herein a dual‐site regulatory strategy is reported to tailor the d‐band center of the Co site in CoOOH via the controlled electronic transfer at the Ru─O─Co─O─Fe bonding structure. Through the bridged O2− site, electrons are vastly flowed from the t2g‐orbital of the Ru site to the low‐spin orbital of the Co site in the Ru–O–Co coordination and further transfer from the strong electron–electron repulsion of the Co site to the Fe site by the Co–O–Fe coordination, which balancing the electronic configuration of Co sites to weaken the over‐strong adsorption energy barrier of OH* and O*, respectively. Benefiting from the highly active of the Co site, the constructed (Ru2Fe2Co6)OOH provide an extremely low overpotential of 248 mV and a Tafel slope of 32.5 mV dec−1 at 10 mA cm−2 accompanied by long durability in alkaline OER, far superior over the pristine and Co–O–Fe bridged CoOOH catalysts. This work provides guidance for the rational design and in‐depth analysis of the optimized role of metal dual‐sites.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Controllable Electronic Transfer Tailoring d‐band Center via Cobalt–Oxygen‐Bridged Ru/Fe Dual‐sites for Boosted Oxygen Evolution

Zhu,

Zhang,

Chen

et al. 2024

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“…Epoxy resin is a commonly utilized packaging material for electrical equipment and electronic devices because of its exceptional insulation performance, thermal resistance and mechanical strength. [1][2][3] However, epoxy typically has an intrinsically hard and brittle nature due to its crosslinked molecular structure. 4 Unfortunately, this attribute triggers the formation and spread of microcracks and defects while being processed and utilized, ultimately resulting in material breakdown and drastically reducing the lifespan of electronic equipment.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the healability and degradability of epoxy via synergetic steric and electron-withdrawing effects for green electrical packaging

Zhang,

Sun,

Guo

et al. 2024

J. Mater. Chem. A

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“…C. Wang et al have studied the trap characteristics for specific liquid rubber toughened epoxy resins through the thermally stimulated depolarization current method, finding that the trap energy level increases with an increasing rubber concentration, which may be considered in the application in such an epoxy resin system (Wang et al, 2022). C. Chen et al have investigated space charge accumulation for the SiC-epoxy resin interface, which may affect the insulation reliability of packaging materials (Chen et al, 2022).…”

mentioning

confidence: 99%

Editorial: Polymers for high electric field applications

et al. 2023

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Polymers have been found to have wide applications in power equipment, due to their excellent electric insulation properties, energy storage performance, and mechanical behaviors. The continuous development of electric systems towards higher voltages, larger capacity, miniaturization, and a stringent environment has posed an increasing challenge for the investigation of polymeric materials. Attention has been directed towards polymeric dielectric properties, charge transportation/space charge, electric breakdown, interfacial phenomenon, and treeing, etc., to increase electric performances. These properties rely on the morphological and molecular structure of the polymer, particularly on its crystalline and amorphous phase and long-period and interfacial structures. The authors of this Research Topic have reported the in-depth investigations being conducted in this field.For power cable insulation polymers, the working voltages for the manufactured cable go up to 500 kV for HVAC and 640 kV for HVDC applications, and the insulation thickness is enlarged, leading to difficulty in the removal of the byproducts caused by the crosslinking of polyethene (PE). In the case of the HVDC cable, the residual crosslinking byproducts may significantly influence the electric field distribution by affecting the conductivity of crosslinked polyethene (XLPE). F. Li et al. have reported a phase field model to quantitatively calculate the migration of crosslinking byproducts during degassing, considering the Fickian diffusion and uphill diffusion. The electric field distortion caused by the non-uniformity of byproduct distribution in cable insulation has been further evaluated. Another aspect is that the crosslinking network structure of XLPE makes the extruded cable insulation unrecyclable, which may cause pollution for the cables that are out of service (Li et al., 2022a). L. Li et al. have designed a blending material system consisting of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) forming a eutectic structure, which can be considered as a potential replacement of XLPE in the future. The long-term reliability of such a material system has been evaluated through investigations of its electric treeing and thermal aging phenomenon. The results show the LLDPE-HDPE blending material exhibits better anti-aging performance because of its large crystallinity, with a uniform and fine spherulite structure compared to XLPE, demonstrating that blending materials are promising environmentally friendly candidates for XLPE (Li et al., 2022b).

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Transport Characteristics of Interfacial Charge in SiC Semiconductor–Epoxy Resin Packaging Materials

Cited by 6 publications

References 24 publications

Controllable Electronic Transfer Tailoring d‐band Center via Cobalt–Oxygen‐Bridged Ru/Fe Dual‐sites for Boosted Oxygen Evolution

Controllable Electronic Transfer Tailoring d‐band Center via Cobalt–Oxygen‐Bridged Ru/Fe Dual‐sites for Boosted Oxygen Evolution

Enhancing the healability and degradability of epoxy via synergetic steric and electron-withdrawing effects for green electrical packaging

Editorial: Polymers for high electric field applications

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