Structurally modified V2O5 based extrinsic pseudocapacitor

Himadri Raha

doi:10.1088/1361-6528/ac5df6

2022-04-01

PRE

Himadri Raha

Debabrata Pradhan

Prasanta Kumar Guha *

DOI：10.1088/1361-6528/ac5df6

原文链接

原文求助

摘要

En 中文

Rapidly changing demand on energy storage systems makes it essential to redesign the device architecture and materials required to fabricate the devices. It is crucial to introduce capacitive behaviour in a conventional energy storage device (batteries) to improve the lifetime and power efficiency of the hole energy storage system. The charge storing nature of electrode material primarily depends on particle size, grain size, the electrode's chemical structure, and effective diffusion lengths for electrolytes within the electrode. Here V2O5 based Li-ion battery electrode is transformed into a Li-ion pseudocapacitive electrode by structural modifications. The modified structures are achieved by optimizing reaction pressure to obtain larger, medium and smaller V2O5 particles (namely, V2O5-L, V2O5-M and V2O5-S). As a result, the plateau regions in galvanostatic charge-discharge plots and highly intense redox peaks in the CV plots of V2O5-L get flattened for V2O5-S. Also, the lucrative improvement in rate capabilities and stability for V2O5-S indicates induced pseudocapacitance in V2O5. Some devices are fabricated with the extrinsic pseudocapacitive material (V2O5-S), providing 4.36 mWh cm(-3) volumetric energy density with 125 mW cm(-3) volumetric power density. The device retains around 95% of its initial capacitance after 10k cycles and holds up to 63% after 25k stability cycles.

Keyword:

Li-ion supercapacitor

extrinsic pseudocapacitor

structural modification of V2O5

SAED pattern

PAM-Li2SO4

gel electrolyte

期刊

Journal of Nanotechnology

IF:

4.1

论文数:

1.3K

被引数:

1.2K

机构

indian institute of technology system (iit system)

学者数:

9.5W

论文数: 9.9W

被引数: 93

引用论文

Energy Storage in Nanomaterials - Capacitive Pseudocapacitive, or Battery-like?纳米材料中的能量存储-电容性赝电容，还是电池式？

ACS NANO

IF16

2018-03-27

1.3K

OAAI

Gogotsi, Yury; Penner, Reginald M.

Suppression of Electrochemically Driven Phase Transitions in Nanostructured MoS2 Pseudocapacitors Probed Using Operando X-ray Diffraction 使用Operando x射线衍射探测的纳米结构MoS2伪电容器中电化学驱动的相变的抑制

ACS NANO

IF16

2019-01-15

PREAI

Cook, John B.; Lin, Terri C.; Kim, Hyung-Seok; Siordia, Andrew; Dunn, Bruce S.; Tolbert, Sarah H.

Aqueous MXene/PH1000 Hybrid Inks for Inkjet-Printing Micro-Supercapacitors with Unprecedented Volumetric Capacitance and Modular Self-Powered Microelectronics 水性MXene/PH1000混合油墨，用于喷墨打印微型超级电容器，具有前所未有的体积电容和模块化自供电微电子器件

ADVANCED ENERGY MATERIALS

IF26

2021-04-28

138

PREAI

Ma, Jiaxin; Zheng, Shuanghao; Cao, Yuexian; Zhu, Yuanyuan; Das, Pratteek; Wang, Hui; Liu, Yu; Wang, Jiemin; Chi, Liping; Liu, Shengzhong (Frank); Wu, Zhong-Shuai

Facile synthesis of V2O5/graphene composites as advanced electrode materials in supercapacitors V2O5/石墨烯复合材料作为超级电容器高级电极材料的简易合成

JOURNAL OF ALLOYS AND COMPOUNDS

IF6.3

2021-05-01

PREAI

Fu, Min; Zhuang, Qingru; Zhu, Zitong; Zhang, Zhihao; Chen, Wei; Liu, Qingyun; Yu, Hao

Drug Release Behavior of a Drug-Loaded Polylactide Nanofiber Web Prepared via Laser-Electrospinning

Journal of Macromolecular Science, Part B

IF0

2019-05-15

PREAI

Midori Takasaki; Keita Nakashima; Ryo Tsuruda; Tomoki Tokuda; Katsufumi Tanaka; Haruki Kobayashi