Your browser doesn't support javascript.
loading
In Situ Induced Lattice-Matched Interfacial Oxygen-Passivation-Layer Endowing Li-Rich and Mn-Based Cathodes with Ultralong Life.
He, Wei; Zhuang, Yanping; Mei, Jie; Guo, Weibin; Chen, Feng; Chang, Zhanying; Fan, Mengjian; Liu, Chuan; Wang, Laisen; Liu, Pengfei; Zhu, Zi-Zhong; Xie, Qingshui; Peng, Dong-Liang.
Afiliação
  • He W; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Zhuang Y; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Mei J; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Guo W; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Chen F; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Chang Z; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Fan M; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Liu C; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China.
  • Wang L; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Liu P; Zhengzhou Key Laboratory of Big Data Analysis and Application, Henan Academy of Big Data, Zhengzhou University, Zhengzhou, 450002, P. R. China.
  • Zhu ZZ; Collaborative Innovation Centre for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen, 361005, P. R. China.
  • Xie Q; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
  • Peng DL; State Key Lab of Physical Chemistry of Solid Surface, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China.
Small ; 18(30): e2200942, 2022 Jul.
Article em En | MEDLINE | ID: mdl-35760758
ABSTRACT
The high capacity of Li-rich and Mn-based (LRM) cathode materials is originally due to the unique hybrid anion- and cation redox, which also induces detrimental oxygen escape. Furthermore, the counter diffusion of released oxygen (into electrolyte) and induced oxygen vacancies (into the interior bulk phase) that occurs at the interface will cause uncontrolled phase collapse and other issues. Therefore, due to its higher working voltage (>4.7 V) than the activation voltage of lattice oxygen in LRM (≈4.5 V), the anion-redox-free and structurally consistent cobalt-free LiNi0.5 Mn1.5 O4 (LNMO) is selected to in situ construct a robust, crystal-dense and lattice-matched oxygen-passivation-layer (OPL) on the surface of LRM particles by the electrochemical delithiation to protect the core layered components. As expected, the modified sample displays continuously decreasing interfacial impedance and high specific capacity of 135.5 mAh g-1 with a very small voltage decay of 0.67 mV per cycle after 1000 cycles at 2 C rate. Moreover, the stress accumulation during cycling is mitigated effectively. This semicoherent OPL strengthens the surface stability and interrupts the counter diffusion of oxygen and oxygen vacancies in LRM cathode materials, which would provide guidance for designing high-energy-density layered cathode materials.
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Small Assunto da revista: ENGENHARIA BIOMEDICA Ano de publicação: 2022 Tipo de documento: Article
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Small Assunto da revista: ENGENHARIA BIOMEDICA Ano de publicação: 2022 Tipo de documento: Article