Long Cycle Life Rechargeable Moisture‐Enabled Electricity Cell

Shi, Mengfan; Yang, Ya'nan; Han, Yuyang; Wang, Jiaqi; Wang, Ying; Li, Dan; Lv, Jinsheng; Wu, Wenpeng; Wang, Zhenglin; Wei, Xiaoyan; Chen, Nan

doi:10.1002/aenm.202303815

Cited by 8 publications

(1 citation statement)

References 43 publications

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“…Moreover, OPNG can use the concentration difference between seawater and fresh water as energy driving force, while MENG can use ambient air humidity. Although the output power density in existing devices is lower, it has the advantages of stable operation and good repeatability, and has been received increasing attentions [33,146]. Although polymer nanogenerators are environmentally friendly, their output performance is still relatively small (~mW/cm 2 ) and unstable.…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

A Review of Polymer-Based Environment-Induced Nanogenerators: Power Generation Performance and Polymer Material Manipulations

Xie,

Yan,

2024

Polymers

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Natural environment hosts a considerable amount of accessible energy, comprising mechanical, thermal, and chemical potentials. Environment-induced nanogenerators are nanomaterial-based electronic chips that capture environmental energy and convert it into electricity in an environmentally friendly way. Polymers, characterized by their superior flexibility, lightweight, and ease of processing, are considered viable materials. In this paper, a thorough review and comparison of various polymer-based nanogenerators were provided, focusing on their power generation principles, key materials, power density and stability, and performance modulation methods. The latest developed nanogenerators mainly include triboelectric nanogenerators (TriboENG), piezoelectric nanogenerators (PENG), thermoelectric nanogenerators (ThermoENG), osmotic power nanogenerator (OPNG), and moist-electric generators (MENG). Potential practical applications of polymer-based nanogenerator were also summarized. The review found that polymer nanogenerators can harness a variety of energy sources, with the basic power generation mechanism centered on displacement/conduction currents induced by dipole/ion polarization, due to the non-uniform distribution of physical fields within the polymers. The performance enhancement should mainly start from strengthening the ion mobility and positive/negative ion separation in polymer materials. The development of ionic hydrogel and hydrogel matrix composites is promising for future nanogenerators and can also enable multi-energy collaborative power generation. In addition, enhancing the uneven distribution of temperature, concentration, and pressure induced by surrounding environment within polymer materials can also effectively improve output performance. Finally, the challenges faced by polymer-based nanogenerators and directions for future development were prospected.

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Section: Conclusion and Future Prospectsmentioning

confidence: 99%

A Review of Polymer-Based Environment-Induced Nanogenerators: Power Generation Performance and Polymer Material Manipulations

Xie,

Yan,

2024

Polymers

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Multifunctional Power Generators beyond Moisture Limitation

Liu,

Li,

Yang

et al. 2024

Adv Funct Materials

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The moisture‐enabled electricity generators (MEGs) represent an appealing clean power strategy within the realm of hydrovoltaic technology. However, their stable operation under all‐weather conditions is still challengeable due to the effect of ambient humidity. Herein, a self‐water‐storage MEGs with multifunctionality was developed. Gel textiles are employed as the proton‐release layer, while graphite fibers loaded with tin‐bismuth alloy liquid metal serve as water‐storing electrode. The gel textiles absorb water permeating down from the electrodes, releasing protons, which then react with the active electrode to enhance output performance. The experiment demonstrates that a device can generate a voltage of 0.55 V and a current of 7.08 μA after water storage, with a maximum power density of 1.14 μW·cm‐². The device's performance output can remain stable within a wide temperature range. The experiment confirms that the electrical output of the device originates from ionic diffusion, while density functional theory (DFT) and molecular dynamics (MD) calculations reveal the importance of the strong hydrolysis ability of the polymer and the high adsorption energy of the liquid metal for H3O+ on the output performance of the device. Furthermore, the integrated device has demonstrated effective applications in driving microelectronic devices, charging capacitors and, self‐powered health monitoring.

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Revolutionizing Aquatic Robotics: Advanced Biomimetic Strategies for Self‐Powered Mobility Across Water Surfaces

Elhadad,

Gao,

Choi

2024

Adv Materials Technologies

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Aquatic mobile robots are gaining attention for their potential to revolutionize marine monitoring and exploration within the Ocean Internet of Things. A significant challenge for these untethered robots, especially in remote areas, is achieving energy autonomy. This work presents an innovative self‐sustaining energy system for compact aquatic robots, inspired by biological digestion. Utilizing microbial fuel cell (MFC) technology, organic materials found in aquatic environments are converted into electricity through catalytic redox reactions. To extend the MFC's lifespan, spore‐forming Bacillus subtilis is used as the anodic biocatalyst, leveraging its ability to endure harsh conditions and reactivate in favorable environments, thus enhancing the MFC's longevity. To ensure a steady supply of organic substrates for microbial viability, a biomimetic Janus membrane with asymmetric surface wettability is integrated, enabling selective substrate intake. Additionally, stability mechanisms inspired by water striders allow the robot to move efficiently across water surfaces. The robot mimics the water strider's movement using a motor powered by microbial metabolism, fueled by organic nutrients via the Janus membrane. This study demonstrates the feasibility of using natural processes for technological advancement, setting new benchmarks in the design of autonomous systems.

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Long Cycle Life Rechargeable Moisture‐Enabled Electricity Cell

Cited by 8 publications

References 43 publications

A Review of Polymer-Based Environment-Induced Nanogenerators: Power Generation Performance and Polymer Material Manipulations

A Review of Polymer-Based Environment-Induced Nanogenerators: Power Generation Performance and Polymer Material Manipulations

Multifunctional Power Generators beyond Moisture Limitation

Revolutionizing Aquatic Robotics: Advanced Biomimetic Strategies for Self‐Powered Mobility Across Water Surfaces

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