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Unveiling Atom Migration Abilities Affected Anode Performance of Sodium-Ion Batteries |
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| Authors: | Dr Qizheng Zheng Dr Shiyuan Zhou Shi Tang Dr Hongbin Zeng Dr Yonglin Tang Dr Zhengang Li Dr Sangui Liu Dr Liangping Xiao Prof Ling Huang Prof Yu Qiao Prof Shi-Gang Sun Prof Hong-Gang Liao |
| Institution: | 1. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China;2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China
These authors contributed equally to this work. Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Investigation (equal), Methodology (equal), Project administration (equal), Software (equal), Visualization (equal), Writing - original draft (equal), Writing - review & editing (equal);3. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Conceptualization (supporting), Data curation (supporting), Formal analysis (supporting), Investigation (supporting), Methodology (supporting), Project administration (supporting), Software (supporting), Visualization (supporting), Writing - original draft (supporting), Writing - review & editing (supporting);4. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Formal analysis (supporting), Visualization (supporting);5. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Methodology (supporting);6. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Software (supporting), Visualization (supporting);7. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Formal analysis (supporting), Software (supporting), Visualization (supporting);8. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Writing - review & editing (supporting);9. State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China Contribution: Conceptualization (supporting), Supervision (supporting), Validation (supporting), Writing - review & editing (supporting) |
| Abstract: | In sodium-ion batteries (SIBs), the low initial coulombic efficiency (ICE) is commonly induced by irreversible phase conversion and difficult desodiation, especially on transition metal compounds (TMCs). Yet the underlying physicochemical mechanism of poor reaction reversibility is still a controversial issue. Herein, by using in situ transmission electron microscopy and in situ X-ray diffraction, we demonstrate the irreversible conversion of NiCoP@C is caused by the rapid migration of P in carbon layer and preferential formation of isolated Na3P during discharge. By modifying the carbon coating layer, the migration of Ni/Co/P atoms is inhibited, thus the improvement of ICE and cycle stability is realized. The inhibiting of fast atom migration which induces component separation and rapid performance degradation might be applied to a wide range of electrode materials, and guides the development of advanced SIBs. |
| Keywords: | Atoms Migration Disordered Carbon Sodium-Ion Batteries Transition Metal Phosphides In Situ TEM |