ORCID Profile
0000-0002-6123-4789
Current Organisations
Shenzhen University
,
The Hong Kong Polytechnic University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: American Chemical Society (ACS)
Date: 10-02-2023
Publisher: Wiley
Date: 05-11-2021
Abstract: The ever‐increasing development of flexible and wearable electronics has imposed unprecedented demand on flexible batteries of high energy density and excellent mechanical stability. Rechargeable lithium (Li) metal battery shows great advantages in terms of its high theoretical energy density. However, the use of Li metal anode for flexible batteries faces huge challenges in terms of its undesirable dendrite growth, poor mechanical flexibility, and slow fabrication speed. Here, a highly scalable Li‐wicking strategy is reported that allows ultrafast fabrication of mechanically flexible and electrochemically stable Li metal anodes. Through the rational design of the interface and structure of the wicking host, the mean speed of Li‐wicking reaches 10 m 2 min −1 , which is 1000 to 100 000 fold faster than the reported electrochemical deposition or thermal infusion methods and meets the industrial fabrication speed. Importantly, the Li‐wicking process results in a unique 3D Li metal structure, which not only offers remarkable flexibility but also suppresses the dendrite formation. Paring the Li metal anode with lithium‐iron phosphate or sulfur cathode yields flexible full cells that possess a high charging rate (8.0 mA cm −2 ), high energy density (300–380 Wh kg −1 ), long cycling stability (over 550 cycles), and excellent mechanical robustness (500 bending cycles).
Publisher: Wiley
Date: 09-06-2022
Abstract: Inkjet‐printed metal electrodes with desirable morphologies and electrical properties are indispensable cornerstones for printable and flexible electronics. However, methods to fabricate metal electrodes nowadays mostly request the sintering of printed metal particles, which not only will easily damage heat‐sensitive plastic substrates, but also is difficult to achieve a smooth, neat, and highly adhesive electrode structure. Herein, a room‐temperature, solution‐processable copper (Cu) electrode is demonstrated to overcome the above issues. The key is to inkjet print a stable xerogel scaffold with high porosity, good uniformity, and smoothness for growing high‐quality Cu via electroless deposition. Xerogel‐based Cu electrodes exhibit a bi‐layer architecture, consisting of an upper thin‐film Cu (with an electrical conductivity of ≈1.2 × 10 7 S m −1 ) and a bottom Cu‐polymer interpenetrated network. The electrodes show an excellent uniformity, surface smoothness, high interfacial energy to the plastic substrates (690–970 mJ m −2 ), and good flexibility. Taking these merits, the electrodes can be patterned onto various plastic substrates and fabricate all‐solution‐processed electronic devices such as organic thin‐film transistors and organic electrochemical transistors with stable electrical performance.
Publisher: Springer Science and Business Media LLC
Date: 21-01-2022
DOI: 10.1038/S41528-022-00134-2
Abstract: Transparent electrodes (TEs) with high chemical stability and excellent flexibility are critical for flexible optoelectronic devices, such as photodetectors, solar cells, and light-emitting diodes. Ultrathin metal electrode (thickness less than 20 nm) has been a promising TE candidate, but the fabrication can only be realized by vacuum-based technologies to date, and require tedious surface engineering of the substrates, which are neither ideal for polymeric based flexible applications nor suitable for roll-to-roll large-scale manufacture. This paper presents high-performance nanostructured transparent metal electrodes formation via displacement–diffusion-etch (DDE) process, which enables the solution-processed sub-20-nm-thick ultrathin gold electrodes (UTAuEs) on a wide variety of hard and soft substrates. UTAuEs fabricated on flexible polyethylene terephthalate (PET) substrates show a high chemical/environmental stability and superior bendability to commercial flexible indium–tin-oxide (ITO) electrodes. Moreover, flexible organic solar cells made with UTAuEs show similar power conversion efficiency but much enhanced flexibility, in comparison to that of ITO-based devices.
No related grants have been discovered for Yaokang ZHANG.