Academic Journal
Simultaneously enhancing the electronic and ionic conductivities of Li2ZnTi3O8 via modification with polyacrylonitrile-derived carbon for high-performance anodes
| Title: | Simultaneously enhancing the electronic and ionic conductivities of Li2ZnTi3O8 via modification with polyacrylonitrile-derived carbon for high-performance anodes |
|---|---|
| Authors: | Yujun Bai, Jiali Qin, Jiaxuan Cai, Huiling Zhu, Tao Li, Yanxiang Wang, Yongxin Qi |
| Source: | ChemPhysMater, Vol 2, Iss 1, Pp 43-51 (2023) |
| Publisher Information: | KeAi Communications Co., Ltd., 2023. |
| Publication Year: | 2023 |
| Collection: | LCC:Chemistry LCC:Physics |
| Subject Terms: | Conductivity, Polyacrylonitrile, Li2ZnTi3O8, Carbon coating, N-doping, Chemistry, QD1-999, Physics, QC1-999 |
| More Details: | Polyacrylonitrile (PAN) with C≡N bonds can be converted to nitrogen-doped carbon during carbonization, which enhances electronic conductivity by compensating for the deficiency of the Li2ZnTi3O8 (LZTO) anode. In this study, LZTO was modified by carbonizing a homogeneous PAN/LZTO powder mixture at approximately 800 ℃ for 5 h in nitrogen stream to uniformly coat nitrogen-doped carbon around the LZTO particles and to yield nitrogen-doped LZTO. PAN-60 exhibited a capacity retention of 74.8% as the current density increased from 0.1 to 1.6 A g−1, and had charge/discharge capacities of 250.1/250.8 mAh g−1 even after 1100 cycles at 0.5 A g−1. Structural and compositional analysis along with electrochemical tests showed that the uniform nitrogen-doped carbon coating and the nitrogen-doped LZTO favor electron transfer, while the defects induced by nitrogen-doping in LZTO promote Li-ion migration. The enhanced electronic and ionic conductivities are favorable to alleviate the polarization during cycling, and thus are responsible for the optimized performance. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2772-5715 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2772571522000122; https://doaj.org/toc/2772-5715 |
| DOI: | 10.1016/j.chphma.2022.01.002 |
| Access URL: | https://doaj.org/article/cf059770363e4ce1b94403a371f3b519 |
| Accession Number: | edsdoj.f059770363e4ce1b94403a371f3b519 |
| Database: | Directory of Open Access Journals |
| ISSN: | 27725715 |
|---|---|
| DOI: | 10.1016/j.chphma.2022.01.002 |
| Published in: | ChemPhysMater |
| Language: | English |