All‐Solid‐State Fiber Supercapacitors with Ultrahigh Volumetric Energy Density and Outstanding Flexibility

By Zhenghui Pan, Jie Yang, Qichong Zhang, Meinan Liu, Yating Hu, Zongkui Kou, Nathan Liu, Xin Yang, Xiaoyu Ding, Hao Chen and 6 more. Advanced Energy Materials, 2019

209 citations recorded by the source corpus.

Fiber supercapacitors (FSCs) represent a promising class of energy storage devices that can complement or even replace microbatteries in miniaturized portable and wearable electronics. One of their main limitations, however, is the low volumetric energy density when compared with those of rechargeable batteries. Considering the energy density of FSC is proportional to CV2 (E = 1/2 CV2, where C is the capacitance and V is the operating voltage), one would explore high operating voltage as an effective strategy to promote the volumetric energy density. In the present work, an all‐solid‐state asymmetric FSC (AFSC) with a maximum operating voltage of 3.5 V is successfully achieved, by employing an ionic liquid (IL) incorporated gel‐polymer as the electrolyte (EMIMTFSI/PVDF‐HFP). The optimized AFSC is based on MnOx@TiN nanowires@carbon nanotube (NWs@CNT) fiber as the positive electrode and C@TiN NWs@CNT fiber as the negative electrode, which gives rise to an ultrahigh stack volumetric energy density of 61.2 mW h cm−3, being even comparable to those of commercially planar lead‐acid batteries (50–90 mW h cm−3), and an excellent flexibility of 92.7% retention after 1000 blending cycles at 90°. The demonstration of employing the ILs‐based electrolyte opens up new opportunities to fabricate high‐performance flexible AFSC for future portable and wearable electronic devices.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/adb91dccb381063a772cdb2fccdb1e5286865cdb

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In Electrical and Electronic Engineering

1. A. Yu
2. Ya-Ping Deng
3. Zhongwei Chen
4. Yi Jiang
5. Guillermo Tostado-Blázquez
6. Derya Baran
7. Daniel Corzo

In Electronic, Optical and Magnetic Materials

1. A. Yu
2. Zhongwei Chen

Citations in the corpus

• Recent Progress on Flexible Zn-Air Batteries (2021, background): “Continuous development of flexible and wearable devices, such as touch screens, roll-up monitors, smart electronics and wearable sensors, has brought great evolution to our lifestyle.[1-9] Accordingly, some advanced concepts and products have been developed, such as Jawbone UP, Nokia Morph Concept a”
• Flexible Electronics: Status, Challenges and Opportunities (2020, background): “, 2018) or poor mechanical durability (Pan et al., 2019), have elevated the heed in carbonaceous materials and nanocarbons to improve the already effective devices, like Li-ion batteries and supercapacitors.”