Inorganic Chemicals Industry >
Study on properties of n-eicosane/SAT/expanded graphite composites with high energy storage density
Received date: 2024-12-02
Online published: 2026-01-20
As a clean energy，solar energy has great potential in dealing with energy and environmental problems，but its utilization efficiency is limited due to its instability.The development of high⁃performance phase change material（PCM） composites is of great significance to solar thermal storage technology，which can effectively solve the problem of space⁃time mismatch between solar energy supply and demand.The purpose of this study is to prepare porous PCM with stable morphology，low undercooling and excellent photothermal conversion performance to solve the problem of space⁃time mismatch between solar energy supply and demand.The composite PCMs with porous expanded graphite as carrier material，n-eicosane as stabilizer and sodium acetate trihydrate（SAT） as phase change energy storage medium was prepared by melt mixing process.The results showed that the composite PCMs sample containing 3.3% expanded graphite had excellent performance.Its phase change enthalpy was 266.54 J/g，and the photothermal conversion efficiency was as high as 91.14%.There was almost no leakage at 90 ℃，and the supercooling degree was reduced to 2.50 ℃.It was also found that although EG had a negative effect on the phase change enthalpy，the composite PCMs remained between 225.71 J/g and 268.30 J/g due to the high enthalpy of SAT.In summary，the modification of SAT with EG and n-eicosane could effectively reduce supercooling，improve photothermal conversion efficiency，and provide a feasible solution for efficient storage and utilization of solar energy.
LI Yajing . Study on properties of n-eicosane/SAT/expanded graphite composites with high energy storage density[J]. Inorganic Chemicals Industry, 2026 , 58(1) : 60 -66 . DOI: 10.19964/j.issn.1006-4990.2024-0649
| [1] | 程寒，唐波，包华阳，等.改善储能石蜡基相变材料导热性能研究进展［J］.化工新型材料，2025，53（4）：45-50. |
| CHENG Han， TANG Bo， BAO Huayang，et al.Research progress on improving the thermal conductivity of energy storage paraffin?based phase change materials［J］.New Chemical Materials，2025，53（4）：45-50. | |
| [2] | 高易，胡晨曦，郭照琰，等.相变储能材料封装技术研究进展［J］.化工进展，2025，44（10）：5789-5799. |
| GAO Yi， HU Chenxi， GUO Zhaoyan，et al.Research progress on encapsulation technology of phase change materials［J］.Chemical Industry and Engineering Progress，2025，44（10）：5789-5799. | |
| [3] | WANG Yunming， TANG Bingtao， ZHANG Shufen.Single?walled carbon nanotube/phase change material composites：Sunlight?dri? |
| ven，reversible，form?stable phase transitions for solar thermal energy storage［J］.Advanced Functional Materials，2013，23（35）：4354-4360. | |
| [4] | 王汇杰，胡江涛，盖晓倩，等.纳米纤维素在相变储能领域的应用研究进展［J］.材料导报，2025，39（16）：236-247. |
| WANG Huijie， HU Jiangtao， GAI Xiaoqian，et al.Advancements in the utilization of nanocellulose for phase change energy storage applications［J］.Materials Reports，2025，39（16）：236-247. | |
| [5] | 温家宝，苑兴洲，杨占旭.蛭石基复合相变储能材料研究进展［J］.化工新型材料，2025，53（3）：29-34，41. |
| WEN Jiabao， YUAN Xingzhou， YANG Zhanxu.Research progress of vermiculite?based composite phase change energy storage materials［J］.New Chemical Materials，2025，53（3）：29-34，41. | |
| [6] | BAHIRAEI M， MONAVARI A， MOAYEDI H.Second law assessment of nanofluid flow in a channel fitted with conical ribs for utilization in solar thermal applications：Effect of nanoparticle shape［J］.International Journal of Heat and Mass Transfer，2020，151：119387. |
| [7] | NAZARI S， SAFARZADEH H， BAHIRAEI M.Experimental and analytical investigations of productivity，energy and exergy efficiency of a single slope solar still enhanced with thermoelectric channel and nanofluid［J］.Renewable Energy，2019，135：729- 744. |
| [8] | 刘萍，谭浩若，冯民生，等.硅藻基相变储能材料的研究进展［J］.功能材料，2024，55（9）：9053-9063. |
| LIU Ping， TAN Haoruo， FENG Minsheng，et al.Research progress of diatom?based phase change energy storage materials［J］.Journal of Functional Materials，2024，55（9）：9053-9063. | |
| [9] | HUANG Hao， SHI Tongyu， HE Rui，et al.Phase?changing microcapsules incorporated with black phosphorus for efficient solar energy storage［J］.Advanced Science，2020，7（23）：2000602. |
| [10] | 杨海月，周加左，王成毓，等.功能型相变储能木材研究进展［J］.木材科学与技术，2024，38（5）：11-20. |
| YANG Haiyue， ZHOU Jiazuo， WANG Chengyu，et al.Research pro?gress of multifunctional wood?based phase change composites［J］.Chinese Journal of Wood Science and Technology，2024，38（5）：11-20. | |
| [11] | CUI Wenlong， YUAN Yanping， SUN Liangliang，et al.Experimental studies on the supercooling and melting/freezing characteristics of nano?copper/sodium acetate trihydrate composite phase change materials［J］.Renewable Energy，2016，99：1029-1037. |
| [12] | ZHAO Liang， XING Yuming， LIU Xin，et al.Thermal performance of sodium acetate trihydrate based composite phase change material for thermal energy storage［J］.Applied Thermal Engineering，2018，143：172-181. |
| [13] | GU Xiaobin， QIN Shan， WU Xiang，et al.Preparation and thermal characterization of sodium acetate trihydrate/expanded graphite composite phase change material［J］.Journal of Thermal Analysis and Calorimetry，2016，125（2）：831-838. |
| [14] | FANG Guihua， ZHANG Wentao， YU Menghuan，et al.Experimental investigation of high performance composite phase change materials based on sodium acetate trihydrate for solar thermal energy storage［J］.Solar Energy Materials and Solar Cells，2022，234：111418. |
| [15] | LI T X， WU D L， HE F，et al.Experimental investigation on copper foam/hydrated salt composite phase change material for thermal energy storage［J］.International Journal of Heat and Mass Transfer，2017，115：148-157. |
| [16] | LUAN Yi， YANG Ming， MA Qianqian，et al.Introduction of an organic acid phase changing material into metal-organic frameworks and the study of its thermal properties［J］.Journal of Materials Chemistry A，2016，4（20）：7641-7649. |
/
| 〈 |
|
〉 |