Batteries & Supercaps
·
2023
·Vol. 6
·期 5
·e202300010
·
IF 5.7
Pu Yu,Junxiao Wang,Xiaotang Gan,Zhihua Guo,Liang Huang,Zhiping Song
Graphical Bipolar ion storage : Thionin (Thn-CH 3 COO), a biological dye, can be also used as a high-performance bipolar-type organic cathode material for aqueous rechargeable zinc batteries. In the Zn(CF 3 SO 3 ) 2 electrolyte, both CH 3 COO − and CF 3 SO 3 − anions participate the p-type reaction, while H + cation dominate the n-type reaction. Organic cathode materials (OCMs) have been widely applied in aqueous rechargeable zinc batteries (ARZBs), but there are still many novel structures to be explored for better electrochemical performance and clearer mechanism. Herein, we have studied an organic biological dye, namely thionin (Thn-CH 3 COO), as a bipolar-type OCM for ARZBs based on its electroactive phenothiazine unit. In the optimal electrolyte of 2 M Zn(CF 3 SO 3 ) 2 , Thn-CH 3 COO exhibited the lowest solubility and thus the highest cycling stability (94 % capacity retention after 100 cycles), with a reversible capacity of 162 mAh g −1 (the theoretical value is 186 mAh g −1 ) and a discharge plateau at ∼0.8 V vs. Zn 2+ /Zn. Various characterization and DFT calculations have revealed that both CH 3 COO − and CF 3 SO 3 − anions and H + cations participated the p-type and n-type reactions, respectively. In brief, the novel structure, competitive performance, and exhaustive mechanism investigation will facilitate the further development of ARZBs based on OCMs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yanrong Wang,Chenxi Zheng,Mengfan Zhao,Xuemei Wang,Yaqiong Su,Guowang Diao,Caixing Wang
Electroactive organic materials, characterized by their flexible molecular architecture and rapid reaction kinetics, demonstrate an enormous potential for applications in aqueous zinc-ion batteries (AZIBs). However, small-molecule organic electrode materials often encounter dissolution-induced capacity decay, whereas polymeric counterparts, despite their limited solubility in electrolytes, confront poor conductivity issues. To tackle these challenges, optimizing molecular structures and synthesis routes is paramount. In this study, we have elaborately designed an electrochemical polymerized poly(1,5-diaminonaphthalene), termed PDAN-1, as a high-performance cathode material for AZIBs. Compared to the chemically polymerized counterpart, termed PDAN-2, PDAN-1 exhibits significantly enhanced electrochemical performance, owing to its markedly reduced electrochemical resistance. Specifically, the PDAN-1 cathode achieves a high discharge capacity of 243 mAh g–1 at a current density of 0.1 A g–1. Additionally, it exhibited long-term cycle stability, retaining over 85% of its capacity even after 2700 cycles at 2 A g–1. Impressively, even under a substantial mass loading of 10 mg cm–2, PDAN-1 maintains a discharge capacity of 170 mAh g–1, underscoring its vast potential for practical applications in AZIBs. Furthermore, ex situ analyses and density functional theory calculations collectively reveal that the PDAN-1 cathode operates through a bipolar-type charge storage mechanism, providing insights into its unique electrochemical behavior and further validating its suitability for AZIB applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Photonics
·
2025
·
IF 6.7
Ziwen Wang,Zezhong Yin,Dongze Xie,Yifei Wang,Zhenyu Yang,Fukai Shan,Jia Huang,Dandan Hao
Self-powered photodetectors (SPPDs) have attracted considerable attention due to their low power consumption, low cost, and small size. However, traditional SPPDs typically possess a unipolar photoresponse, which adds complexity to the processing of optical signals. Here, self-powered bipolar photodetectors (SP-BPDs) with a structure of ITO/In2O3/CsBi3I10-IR813/C are fabricated by modifying CsBi3I10 using a near-infrared (NIR) organic dye (IR813, p-toluenesulfonate). The photodetector not only broadens its absorption to the NIR range but also generates a reverse current under illumination with wavelengths exceeding 675 nm. The reversal of the photocurrent polarity is attributed to the competition between the photovoltaic effect of the heterojunction and the photothermoelectric effect of IR813 under different wavelengths of light. The current state of the SP-BPD can be effectively modulated by precisely regulating the wavelength and power density of the incident light. Therefore, five basic all-optical logic gates (“OR”, “AND”, “NOT”, “NOR”, and “NAND”) and encrypted optical communication can be realized in the SP-BPD. This study presents a simple and practical strategy for designing SP-BPDs.
研究领域:
光电子学
·
材料科学
·
光子学
·
通信技术
·
纳米技术
✓ 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）