The different energy-storage and charging/discharging mechanisms indicate their pros and cons: EDLCs always show high power density and good runnability while pseudocapacitors manifest high energy density and high capacity [87]. Hybrid SCs are consisted of both types of electrodes and thus combine both double-layer capacitive and
Thus, we review recent advances of both intrinsic polymer films and polymer-based composite films with ultrahigh in-plane thermal conductivity, with deep understandings of heat transfer mechanism, processing methods to enhance thermal conductivity, optimization strategies to reduce interface thermal resistance and their potential
At a BOPP volume content of 67%, the PVTC/BOPP bilayer film exhibited excellent energy storage characteristics. At an electric field strength of 550 kV/mm, the energy storage density and charge/discharge efficiency reached 10.1 J/cm 3 and 80.9%, respectively. The organic multi-layer composite structure utilizes the performance characteristics
Polymer dielectrics are crucial for electronic communications and industrial applications due to their high breakdown field strength (E b), fast charge/discharge speed, and temperature stability.The upcoming electronic-electrical systems pose a significant challenge, necessitating polymeric dielectrics to exhibit exceptional thermal stability and energy storage
Polymer dielectrics are crucial for electronic communications and industrial applications due to their high breakdown field strength (E b), fast charge/discharge speed, and
The resulting TCPCF demonstrates remarkable flexibility, sufficient latent heat of 97 J/g, high thermal conductivity of 1.77 W/m·K, and exceptional resistance to leakage (<1%) at 65 °C. Furthermore, TCPCF facilitates effective thermal management of Li-ion batteries (LIBs) in diverse environmental conditions. Specifically, in cold
The resulting TCPCF demonstrates remarkable flexibility, sufficient latent heat of 97 J/g, high thermal conductivity of 1.77 W/m·K, and exceptional resistance to leakage (<1%) at 65 °C. Furthermore, TCPCF
thermal, mechanical, and other performances. Also, it is an excellent energy storage material [] in the eld of energy 7 storage and conversion. Figure 2a shows the advantages of graphene-based supercapacitors. It has large theoretical surface area, good electronic conductivity, and high elec-trochemical stability, which is widely used in
Flexible highly thermally conductive biphasic composite films for multifunctional solar/electro-thermal conversion energy storage and thermal management Author links open overlay panel Shushan Lv a, Xianglei Liu a b c, Jianguo Wang a, Qiao Xu a, Chao Song a, Yimin Xuan a b c
As a promising approach to thermal storage, phase change materials (PCMs) are widely deployed in the thermal management fields, including industrial waste heat recovery [1, 2], solar thermal utilization [3, 4] and building energy saving [5, 6], for their large thermal storage density [7, 8] and constant temperature [9] during the phase change process.
The collective impact of two strategies on energy storage performance. a–d) Recoverable energy storage density W rec and energy efficiency η for 5 nm thin films of BTO, BFO, KNN, and PZT under various defect dipole densities and different in-plane bending strains (Different colored lines represent in-plane bending strains ranging from 0% to 5%).
Two main strategies can be used for achieving the goal of high thermally conductive BNNS-based polymer films. The first one is to orient the BNNSs to form directional thermally conductive pathways by using specific processing processes, such as freeze-casting, hot pressing, vacuum filtration and so forth [13].Among these methods, the vacuum filtration is
Enhancing the energy storage properties of dielectric polymer capacitor films through composite materials has gained widespread recognition. Among the various strategies for improving dielectric materials, nanoscale coatings that create structurally controlled multiphase polymeric films have shown great promise.
This work uncovers a new method of achieving exceptional high-temperature polymeric dielectric films for high capacitive energy storage by engineering highly aligned 2D MMT/PVA nanosheets at the polymer-electrode interfaces. By probing the energetic modes of transport and aging at pre-breakdown field, it is shown for the first time that the
At a BOPP volume content of 67%, the PVTC/BOPP bilayer film exhibited excellent energy storage characteristics. At an electric field strength of 550 kV/mm, the energy storage density and charge/discharge efficiency
Thus, we review recent advances of both intrinsic polymer films and polymer-based composite films with ultrahigh in-plane thermal conductivity, with deep understandings
The energy storage rate q sto per unit pile length is calculated using the equation below: (3) q sto = m ̇ c w T i n pile-T o u t pile / L where m ̇ is the mass flowrate of the circulating water; c w is the specific heat capacity of water; L is the length of energy pile; T in pile and T out pile are the inlet and outlet temperature of the circulating water flowing through the
Enhancing the energy storage properties of dielectric polymer capacitor films through composite materials has gained widespread recognition. Among the various strategies for improving dielectric materials, nanoscale
The commercial film capacitors made by biaxially oriented polypropylene (BOPP) have high energy efficiency, but low energy density of only 2.0-3.0 J/cm 3, while the
Phase change thermal conductive materials have been applied as heat dissipation interface materials in new electronic devices owing to their high thermal conductivity, phase change energy storage performance, low energy consumption, renewability, and long service life. However, it is a huge challenge to achieve solid–solid phase change materials
The commercial film capacitors made by biaxially oriented polypropylene (BOPP) have high energy efficiency, but low energy density of only 2.0-3.0 J/cm 3, while the inferior thermal stability restricts their high temperature applications.
Phase change thermal conductive materials have been applied as heat dissipation interface materials in new electronic devices owing to their high thermal conductivity, phase change energy storage performance, low energy consumption, renewability, and long service life. However, it is a huge challenge to achieve solid–solid phase change materials with high thermal conductivity,
This work uncovers a new method of achieving exceptional high-temperature polymeric dielectric films for high capacitive energy storage by engineering highly aligned 2D
Here, we report a flexible and form-stable solid-solid/solid-liquid biphasic phase change composites to achieve efficient solar/electro-thermal energy conversion and storage as well as thermal management of high-power devices simultaneously.
Currently, solar-thermal energy storage within phase-change materials relies on adding high thermal-conductivity fillers to improve the thermal-diffusion-based charging rate, which often leads to limited enhancement of
Here, we report a flexible and form-stable solid-solid/solid-liquid biphasic phase change composites to achieve efficient solar/electro-thermal energy conversion and storage
Currently, solar-thermal energy storage within phase-change materials relies on adding high thermal-conductivity fillers to improve the thermal-diffusion-based charging rate, which often leads to limited enhancement of charging speed and sacrificed energy storage capacity. Here we report the exploration of a magnetically enhanced photon
3 天之前· This deep trap level can significantly reduce leakage current and conductivity loss, and the high thermal conductivity of BNNSs also improves the thermal conductivity of
3 天之前· This deep trap level can significantly reduce leakage current and conductivity loss, and the high thermal conductivity of BNNSs also improves the thermal conductivity of nanocomposites. 20 Li et al. 21 selected benzocyclobutene (BCB) as the primary polymer material and then introduced BNNSs with notable wide band gaps (5.97 eV) and excellent
As the demand for flexible wearable electronic devices increases, the development of light, thin and flexible high-performance energy-storage devices to power them is a research priority. This review highlights the latest research advances in flexible wearable supercapacitors, covering functional classifications such as stretchability, permeability, self
When Li-ion battery and supercapacitor are operated at high temperature, the softening of polymer separator is possible to cause electrical short circuit . Thus, thermally conductive films can also be used as the thermal management materials in energy storage devices to dissipate excess heat [13, 214].
At 400 MV/m, the energy loss of coated PI films is 0.55 J/cc which is only 4.3% of uncoated PI films and 18.5% of PEI films. The substantial suppression of energy loss further gives rise to the excellent charge-discharge efficiency of coated PI films, as demonstrated in Fig. 4 (d).
We then explored the high field energy storage performance of coated PI films at 175 ℃ using the electric displacement–electric field loop (DE loop) method.
A flexible dual-phase change energy storage material with a high 37.80 W/ (m⋅K) thermal conductivity is proposed. The photothermal/electrothermal conversion efficiency of PU-SA/EG PCM films can reach 90.5% and 88.7%, respectively.
The resultant Al 2 O 3 surface-coated PEI composite film gives rise to a concurrent high Ud (2.8 J·cm −3) and η (90%) up to 200 °C, with an optimized coating thickness of 150 nm. The high-insulating (bandgap ~5.97 eV ) and thermal conductive BN also showed great potential in enhancing the energy storage performance of PEI.
Compared to the conventional thermal management materials, flexible thermally conductive films with high in-plane thermal conductivity, as emerging candidates, have aroused greater interest in the last decade, which show great potential in thermal management applications of next-generation devices.
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