Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Phase Changes01:19

Phase Changes

4.4K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
4.4K
Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.1K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.1K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

12.5K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.5K
Heating and Cooling Curves02:44

Heating and Cooling Curves

23.0K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
23.0K
States of Matter and Phase Changes00:59

States of Matter and Phase Changes

1.1K
The internal energy of a substance—the total kinetic energy of all its molecules and the potential energy of their associated forces—depends on the strength of the intermolecular forces in the condensed phases and the pressure exerted on the substance. The internal energy of a substance is the highest in the gaseous state, the lowest in the solid state, and intermediate in the liquid state. Phase transitions are caused by changes in physical conditions, such as temperature and...
1.1K
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

17.3K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
17.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Defect-Engineered Ni@Graphitic Carbon Catalyst With Adaptive Coordination for Energy-Efficient Plasma-Assisted Dry Reforming of Methane.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Drug-Coated Balloon Angioplasty for de Novo Subclavian Artery Stenosis: Mid-Term Outcomes and Independent Risk Factors for Restenosis.

Vascular health and risk management·2026
Same author

Association of Michigan Medicaid's Depression Screening Requirement With Changes in Racial and Ethnic Inequities in Diagnosis and Treatment for Perinatal Mental Health Conditions.

Women's health issues : official publication of the Jacobs Institute of Women's Health·2026
Same author

Broadband opto-thermal camouflage and infrared encrypted communication via inverse design.

Light, science & applications·2026
Same author

Sulfur vacancy-carbon modification synergy boosts the electrochemical performance of self-standing VS<sub>2</sub> cathodes in aqueous zinc-ion batteries.

Nanoscale·2026
Same author

Effects of Substitution of Corn with <i>Macadamia integrifolia</i> Husk on Rumen Fermentation Characteristics and Microbial Flora in Goats: An In Vitro Experiment.

Animals : an open access journal from MDPI·2026

Related Experiment Video

Updated: Jul 29, 2025

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
09:09

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Published on: February 5, 2020

7.0K

Oriented High Thermal Conductivity Solid-Solid Phase Change Materials for Mid-Temperature Solar-Thermal Energy

Zhaofeng Dai1, Yuanzhi Gao1, Changling Wang1

  • 1School of Energy & Environment, Southeast University, Nanjing 210096, China.

ACS Applied Materials & Interfaces
|May 25, 2023
PubMed
Summary

Researchers developed novel solid-solid phase change composites for efficient solar energy storage. These materials offer high thermal conductivity and stability, presenting a promising alternative to photovoltaic technology.

Keywords:
expanded graphitemid-temperature solar energy storageoriented high thermal conductivitysolar thermoelectric conversionsolid−solid phase change material

More Related Videos

Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials
09:23

Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials

Published on: May 17, 2024

1.6K
Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
11:11

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

11.1K

Related Experiment Videos

Last Updated: Jul 29, 2025

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
09:09

Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation

Published on: February 5, 2020

7.0K
Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials
09:23

Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials

Published on: May 17, 2024

1.6K
Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
11:11

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

Published on: May 2, 2016

11.1K

Area of Science:

  • Materials Science
  • Energy Storage
  • Renewable Energy

Background:

  • The global energy crisis necessitates advanced solar energy solutions.
  • Phase change materials (PCMs) are crucial for medium-temperature photothermal energy storage.
  • Conventional PCMs suffer from low thermal conductivity and leakage issues.

Purpose of the Study:

  • To develop a stable, high thermal conductivity phase change material for solar energy storage.
  • To address the limitations of conventional PCMs in photothermal applications.
  • To create a viable alternative to photovoltaic technology for solar energy generation.

Main Methods:

  • Utilized tris(hydroxymethyl)aminomethane (TRIS), a solid-solid phase change material with a phase transition at 132 °C.
  • Developed oriented phase change composites (PCCs) by compressing TRIS and expanded graphite (EG) via pressure induction.
  • Integrated PCCs with photo-absorbers for combined solar-thermal conversion and storage.

Main Results:

  • Achieved directional thermal conductivity of 21.3 W/(m·K) in the PCCs.
  • Demonstrated high phase change temperature (132 °C) and large phase change entropy (213.47 J/g) for high-capacity storage.
  • Showcased a solar-thermoelectric generator with an energy output of 93.1 W/m².

Conclusions:

  • The developed PCCs offer a leakage-free solution for mid-temperature solar energy storage.
  • These materials exhibit high thermal conductivity and phase change enthalpy.
  • The technology presents a potential alternative to photovoltaic systems for solar energy generation.