Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 8
·1937-1942
·
IF 4.912
Kun Gao,Dan Ti,Zhipan Zhang
Photocapacitors have emerged as promising self-sufficient energy devices that combine solar cells and supercapacitors for simultaneous energy conversion and storage. Despite significant improvements in their performance during the past few years, fabricating photocapacitors with high open-circuit voltage and energy density remains challenging. Herein, with the aid of a carbon-supported graphene/PEDOT common electrode and an ionic liquid electrolyte, we have successfully developed a photocapacitor that can deliver an unprecedented open-circuit voltage of up to 1.8 V (4.7 V for an array of three photocapacitors in series) and an outstanding energy density of 0.18 W h m−2, together with a high overall efficiency of 7.0%. The device also shows good stability and performance under intermittent or low intensity light illumination.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Zhuanpei Wang,Jianli Cheng,Hui Huang,Bin Wang
Fiber-shaped photocapacitors (FPCs) combine functions of energy harvesting and storage in a single device has attracted great attention for their potential applications in portable and wearable electronics . However, the FPCs suffer from the low photochemical-electric energy conversion efficiency and poor cycling stability due to the limitation of the fiber-shaped electrodes. Herein, high crystalline conductive polymer fibers with high electrocatalytic activity and energy storage efficiency for both energy harvest and energy storage are prepared and used as shared electrode to fabricate efficient and stable FPCs. Synergistically, the FPCs fabricated by combining a fiber-shaped dye-sensitized solar cell and a fiber-shaped supercapacitor into one device by sharing one electrode exhibit a remarkable total photochemical-electric energy conversion efficiency up to 5.1%, which is higher than that of reported energy fibers and even close to those of the planar devices in previous reports. Meanwhile, the fabricated FPCs show superior cycling capability for more than 1700 photocharge/galvanostatic discharge cycles (63 days) with efficiency retention of 70.6%. The FPCs woven into the textile can steadily power the ultraviolet photodetector after photocharged in natural sunlight, showing potential in the application of wearable electronics.
研究领域:
能源材料
·
纳米科技
·
电子工程
✓ 已验证
DOI
Nano Energy
·
2022
·
IF 19.069
Zeyu Song,Jihuai Wu,Liuxue Sun,Tingting Zhu,Chunyan Deng,Xiaobing Wang,Guodong Li,Yitian Du,Qi Chen,Weihai Sun,Leqing Fan,Hongwei Chen,Jianming Lin,Zhang Lan
Solar energy is clean, open, and infinite, but solar radiation on the earth is fluctuating, intermittent, and unstable. So, the sustainable utilization of solar energy needs the complementary combination of high-efficient energy conversion and low-loss energy storage technologies. Hence, a photocapacitor integrated with photo-electrical conversion and electric-chemical storage functions in single device is a cost-effective, volume-effective and functional-effective optimal choice. However, the highest reported conversion storage efficiency of single device is less than 13 %. Here, we investigate the relationship among various efficiencies of photocapacitors during conversion storage process, and propose a function portfolio management concept. Accordingly, a three-terminal photocapacitor integrated with perovskite solar cell and symmetrical supercapacitor units is designed. By harmonizing the energy matching between conversion and storage units and seeking the maximum power points coincide and the maximum efficiency points synchronize, the solar energy conversion storage efficiency of the integrated photocapacitor surpasses milestone of 20 %.
研究领域:
能源材料科学
·
光伏技术
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jianhan Sun,Kun Gao,Xiangyun Lin,Chang Gao,Dan Ti,Zhipan Zhang
Self-powered devices have great potential in daily applications ranging from portable electronics to wearable body sensors, yet their working lifetime and performance are normally limited by the low energy density of the power unit as well as additional resistive losses induced by connections between electronic and power moieties. Herein, we report an effective programmable laser-assisted fabrication of facilely integrated microphotocapacitors (integrated devices of solar cells and microsupercapacitors, mPCs) exhibiting high output voltage and energy density (32.3 μWh cm–2). An mPC pack (8 mPCs in series within a size of 3 × 3 cm2) delivers an excellent Voc of 7.3 V, and an output voltage of 90 V can be obtained with an array of 14 mPC packs when tested outdoors under solar illumination (63 mW cm–2), setting a new benchmark for integrated self-charging power packs. These devices have also shown good stability (stable operation over 2000 cycles, 2.1 × 104 s) and performance under low- or intermittent-intensity light illuminations, highlighting their abilities to work indoors or under cloudy weather.
研究领域:
材料科学
·
纳米技术
·
能源存储
·
光子学
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy & Environmental Science
·
2022
·Vol. 15
·期 10
·4247-4258
·
IF 39.714
Zeyu Song,Jihuai Wu,Yongguang Tu,Liuxue Sun,Tingting Zhu,Guodong Li,Xiaobing Wang,Yitian Du,Chunyan Deng,Qi Chen,Weihai Sun,Miaoliang Huang,Leqing Fan,Yunfang Huang,Yuelin Wei,Yiming Xie,Yu Lin,Hongwei Chen,Jianming Lin,Lan Zhan,Peng Gao,Mohammad Khaja Nazeeruddin,Wei Huang
Photocapacitor integrating both energy harvest and storage functions into a single device is a frontier research orientation, which facilitates the efficient and sustainable utilization of green energy. However, the multi-functions in one device and structural complexity of the integrated device, particularly the mismatch between energy harvest and storage units, lead to a relatively large energy loss in the energy storage and output processes. Here, we design a voltage adjustable hybrid supercapacitor (VAHSC) as an energy storage unit of a three-terminal photocapacitor. The VAHSC effectively harmonizes the energy harvest and storage units, resulting in the current, voltage, power, and energy match between both units. The optimal photocapacitor achieves a storage efficiency as high as 98.28% and Joule efficiency of 86.01%, along with excellent charge/discharge cycle stability. The great leap in this efficiency marks a substantial step towards the practical application of solar-charging energy storage integrated devices.
研究领域:
能量存储与转换
·
太阳能
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）