Nano Energy最新文献

Dexterous manipulation of hand plays a crucial role in daily life, industrial productivity, and research laboratory, etc. Evolution of humanoid robot and virtual training technique raise the demand of human machine interface with fusion of both sensing and feedback functions to realize the close loop interactions. Here, we present a modular glove which combines triboelectric sensor and pneumatic actuator for enabling multi-modal and multi-dimensional sensing and feedback. Owing to commonalities of materials and structural design, pneumatic actuator and triboelectric sensor can be seamlessly merged. The integration of fingertip module and finger module offers cutaneous and kinesthetic feedback with the corresponding sensing functions. The whole glove can perform sensing and actuation for most of the interactive activities, such as touching, twisting, grabbing, rubbing, etc. With the customized wearable signal processing and control system, the robotic hand manipulation and virtual training program were demonstrated to verify the capabilities of improving the tactile perception in different scenarios. In general, the proposed device with a minimalistic design and multi-modal sensing and feedback can improve the issue of missing or mismatch of tactile communication in robotic teleoperation, virtual training, and rehabilitation.

The electrochemical CO₂ reduction (eCO₂RR) is promising for eliminating CO₂, generate valuable chemicals and utilize spare electricity. However, its industrialization is greatly hindered by low CO₂ single-pass conversion efficiency (SPCE) in alkaline/neutral electrolytes, and poor compatibility between the electrolysis and intermittent energy system. Herein, a carbon-negative acidic eCO₂RR system is developed using acidic-tolerant Ag based metal-organic frameworks (Ag-MOFs), achieving a high Faradaic efficiency of CO above 97 % in a broad working window of 10–400 mA cm⁻² for unsaturated Ag-O2 clusters, and a high CO₂ SPCE of 46.3 % even under industrial-level 400 mA cm⁻². Being connected to solar cells, the acidic eCO₂RR system displays a remarkable solar-to-chemical efficiency of 19.74 %, offering great potential for industrial eCO₂RR directly driven by renewable energy. Specifically, the CO/HCOOH selectivity could be manipulated by adjusting the coordination number of Ag atoms in Ag-MOFs, and thus a Pourbaix-diagram is proposed to explain the tunable selectivity theoretically.

Water disinfection is pivotal in controlling disease spread and improving environmental sanitation. However, traditional methods, such as oxidation and irradiation, often necessitate high chemical dosages and lead to the generation of disinfection byproducts (DBPs) and antibiotic-resistant bacteria. Emerging catalytic processes, including photocatalysis, pyrocatalysis, and contact-electro-catalysis, also face significant limitations, such as restricted light energy utilization, suboptimal efficacy, and low material utilization, respectively. In response, piezoelectric water disinfection has gained attention as a promising alternative, capable of overcoming these challenges through mechanical energy conversion. This review provides a comprehensive analysis of piezoelectric water disinfection technology, focusing on its underlying mechanisms, practical applications, and future prospects. We highlight the role of piezoelectric electroporation as a novel disinfection mechanism, complementing the previously explored piezocatalysis. Additionally, we explore various mechanical force sources, emphasizing the potential of non-energy-consuming mechanical forces as a sustainable avenue for advancing piezoelectric disinfection. The feasibility and advantages of this technology are further demonstrated through lists of disinfection cases and a comparative analysis of its economic and ecological benefits relative to both traditional and emerging disinfection methods. Finally, this review discusses strategies to optimize piezoelectric water disinfection technology for universal, efficient, stable, and sustainable water disinfection, aiming to accelerate the adoption of piezoelectric technology as an environmentally friendly solution.

Wireless sensor networks (WSNs) plays a crucial and indispensable role in modern society. Since the energy harvested by triboelectric nanogenerator (TENG) can be used either in battery-based or battery-less self-powered wireless systems, it holds an immense promise as a potential energy choice for WSNs. Due to the huge impedance of TENG, an instantaneous discharging unit is essential. However, as the harvested energy from TENG has high randomness, present discharging units cannot achieve high energy conversion efficiency, stability and universality at the same time. Here, an adaptive threshold voltage based synchronous switching unit (SSU) is proposed to meet all the above criteria. Systematic theoretical and experimental investigations have been conducted to optimize the performance, achieving energy conversion efficiency up to 82.7 % and high universality compatible with almost all kinds of TENGs. Finally, SSU is utilized in battery-based and battery-less self-powered systems, demonstrating its comprehensive all-round properties in achieving high energy conversion efficiency, stability and universality.

Trap-assisted non-radiative recombination in the perovskite (PVK) film is a primary limitation in further enhancing the performance of inverted perovskite solar cells (PSCs). Herein, an effective anti-solvent additive strategy is proposed, employing 1-(2-Methoxyphenyl)piperazine hydrochloride (2MPCl) as a multifunctional anti-solvent additive to passivate defects in PVK. The introduction of 2MPCl effectively passivate Pb²⁺ and halide vacancies through ion bonds and hydrogen bonds, thereby obtaining high-quality PVK films. Besides, the multifunctional 2MPCl can effectively modulate the energy level structure of PVK, resulting in a more n-type PVK surface, thereby facilitating electron transfer between PVK and PCBM. Consequently, the optimization of energy levels and suppression of trap-assisted recombination elevate the efficiency of devices with 2MPCl to 25.02 %, with significantly enhanced stability compared to control devices. This novel anti-solvent additive strategy aims to address the challenge of trap-assisted non-radiative recombination in PVK film, which is important for enhancing the performance of inverted PSCs.