Our research group is mainly engaged in the preparation and application of energy devices, sensors and high-performance functional composites. 

1. The development of flexible active/passive refrigeration materials and devices

2. Design and development of high performance flexible thermal conductivity composites

3. Design and development of multifunctional flexible thermoelectric materials and devices

4. Synthesis and application of stretchable conductive fiber

5. Development and application of bistable memory composite materials

6. Development and application of flexible energy conversion materials and devices

In February 2013, Prof. Ma graduated from Sungkyunkwan University (Supervisor: Professor Seunghyun Baik), then worked as a postdoctoral researcher in the School of Energy Sciences and the Institute of Basic Science of of Sungkyunkwan University. In April 2015, he joined Professor Qibing Pei's research group at the University of California, Los Angeles (UCLA) and continued to work as a postdoctoral researcher. In September 2018, he joined the School of Materials Science and Engineering, Nankai University (professor and doctoral supervisor).

Papers published as correspondence or first author in recent years include Science, Joule, PNAS, Nature Communications, Chemical Society Reviews, Advanced Materials, Advanced Energy Materials, Nano Letters and ACS Nano, etc.; It has authorized 7 patents from the United States, China and South Korea, and applied for 2 international patents and 6 Chinese patents.

Rujun Ma, Ziyang Zhang, Kwing Tong, David Huber, Roy Kornbluh, Yongho Sungtaek Ju and Qibing Pei*, “Highly Efficient Electrocaloric Cooling with Electrostatic Actuation”, Science, 357, 1130–1134 (2017)

1. Quan Zhang#, Yufeng Wang#, Yiwen Lv, Shixiong Yu, Rujun Ma*, Bioinspired zero-energy thermal-management device based on visible and infrared thermochromism for all-season energy saving, Proceedings of the National Academy of Sciences, 119, 38, e2207353119.

2. Quan Zhang#, Yiwen Lv#, Yufeng Wang, Shixiong Yu, Chenxi Li, Rujun Ma* & Yongsheng Chen*, Temperature-dependent dual-mode thermal management device with net zero energy for year-round energy saving, Nature Communications, 13:4874 (2022). 

Heng Cui, Quan Zhang, Yiwen Bo, Peijia Bai, Mengyan Wang, Chunyang Zhang, Xiaoshi Qian*, Rujun Ma*, “Flexible microfluidic electrocaloric cooling capillary tube with giant specific device cooling power density”, Joule, 6, 258-268 (2022)

Rujun Ma*, Shu-Yu Chou, Yu Xie and Qibing Pei*, “Morphological/Nanostructural Controls Toward Intrinsically Stretchable Organic Electronics”, Chemical Society Reviews, 48, 1741-1786 (2019)

Rujun Ma, Mini Mol Menamparambath, Qing Pavel Nikolaev, and Seunghyun Baik*, “Transparent Stretchable Single-walled Carbon Nanotube-polymer Composite Films with Near-infrared Fluorescence”, Advanced Materials, 25, 2548-2553 (2013) 

Rujun Ma, Seoyoung Kwon, Qing Zheng, HyeokYong Kwon, Jae Il Kim, Hyouk Ryeol Choi, and Seunghyun Baik*, “Carbon-nanotube/silver Networks in Nitrile Butadiene Rubber for Highly Conductive Flexible Adhesives”, Advanced Materials, 24, 3344-3349 (2012)

Yiwen Bo, Quan Zhang, Heng Cui, Mengyan Wang, Chunyang Zhang, Wen He, Xiangqian Fan, Yiwen Lv, Xiang Fu, Jiajie Liang, Yi Huang, Rujun Ma*, and Yongsheng Chen, Electrostatic Actuating Double-Unit Electrocaloric Cooling Device with High Efficiency, Advanced Energy Materials, 2003771 (2021)

Chunyang Zhang, Quan Zhang, Ding Zhang, Mengyan Wang, Yiwen Bo, Xiangqian Fan, Fengchao Li, Jiajie Liang, Yi Huang, Rujun Ma*, Yongsheng Chen, “Highly Stretchable Carbon Nanotubes/Polymer Thermoelectric Fibers”,Nano Letters,21, 1047-1055(2021) 

Wen He, Xiang Fu, Peijia Bai, Ding Zhang, Heng Cui, Rujun Ma*, “High-Performance Coaxial Asymmetry Fibrous Supercapacitors with a Poly (vinyl alcohol)–Montmorillonite Separator”, Nano Letters, 21, 9164-9171 (2021) 

Rujun Ma, Jiyong Lee, Dongmin Choi, Hyungpil Moon, and Seunghyun Baik*, “Knitted Fabrics Made from Highly Conductive Stretchable Fibers”, Nano Letters, 14, 1944-1951 (2014) 

Rujun Ma, Byeongguk Kang, Suik Cho, Minjun Choi, and Seunghyun Baik*, “Extraordinary High Conductivity and Strength of Stretchable Fibers of Polyurethane and Silver Nanoflowers”, ACS Nano, 9, 10876-10886 (2015)

Wen He, Xiang Fu, Ding Zhang, Quan Zhang, Kai Zhuo, Zhongyun Yuan, and Rujun Ma*, Recent progress of flexible/wearable self-charging power units based on triboelectric nanogenerators, Nano Energy, 84, 105880 (2021)

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Wen He, Minkyun Sohn, Rujun Ma*, Dae Joon Kang*, “Flexible single-electrode triboelectric nanogenerators with MXene/PDMS composite film for biomechanical motion sensors”, Nano Energy, 78, 105083 (2020)

Wen He,  Rujun Ma*, Dae Joon Kang*, “High-performance, flexible planar microsupercapacitors based on crosslinked polyaniline using laser printing lithography”, Carbon, 161, 117-122 (2020)

Quan Zhang, Jiajie Liang, Yi Huang, Huiyu Chen and Rujun Ma*, “Intrinsically Stretchable Conductors and Interconnects for Electronic Applications”,  Materials Chemistry Frontiers, 3, 1032-1051 (2019)