ALD derived Fe3+-doping toward high performance P2-Na0.75Ni0.2Co0.2Mn0.6O2 cathode material for sodium ion batteries

被引：25

作者：

Hou, Ya'nan ^{[1
]}

Li, Xifei ^{[1
,2
,3
,4
]}

Liu, Wen ^{[2
,3
]}

Kou, Huari ^{[2
,3
]}

Sari, Hirbod Maleki Kheimeh ^{[2
,3
]}

Song, Xiaosheng ^{[2
,3
]}

Li, Jianwei ^{[1
,2
,3
]}

Dou, Shuming ^{[1
]}

Liu, Xiaojing ^{[1
]}

Deng, Sixu ^{[5
]}

Li, Dejun ^{[1
]}

Sun, Xueliang ^{[1
,2
,3
,5
]}

机构：

[1] Tianjin Normal Univ, Coll Phys & Mat Sci, Tianjin Int Joint Res Ctr Surface Technol Energy, Tianjin 300387, Peoples R China

[2] Xian Univ Technol, Inst Adv Electrochem Energy, Xian 710048, Shaanxi, Peoples R China

[3] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China

[4] Zhengzhou Univ, State Ctr Int Cooperat Designer Low Carbon & Envi, 100 Kexue Ave, Zhengzhou 450001, Henan, Peoples R China

[5] Western Univ London, Dept Mech & Mat Engn, Nanomat & Energy Lab, London, ON N6A 5B9, Canada

来源：

MATERIALS TODAY ENERGY | 2019年 / 14卷

基金：

中国国家自然科学基金;

关键词：

Fe3+-doping; Atomic layer deposition; Structure stability; Kinetic process; High voltage; Sodium ion batteries; TRANSITION-METAL OXIDES; ATOMIC LAYER DEPOSITION; ELECTRODE MATERIALS; HIGH-CAPACITY; CYCLING STABILITY; PHASE-TRANSITION; SUBSTITUTION; COMPOSITE; LIMN2O4; O3-TYPE;

D O I：

10.1016/j.mtener.2019.100353

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structural instability and sluggish kinetic process of the pristine Na0.75Ni0.2Co0.2Mn0.6O2 (NCM) occurring at a high working voltage result in obvious capacity loss. In this study, Fe3+ doping onto the surface of the P2-type Na0.75Ni0.2Co0.2Mn0.6O2 (NCM) was fulfilled via post-annealing atomic layer deposition (ALD) derived Fe2O3 layer. It indicates that the modified NCM cathode materials exhibit better crystal structure stability and electrochemical behavior than the pristine NCM at wide voltage windows of 2.4-4.5 V and 2.4-4.7 V vs. Na/Na+. Furthermore, the ALD-30C-annealing material shows a higher initial capacity of 107 mA h g(-1) at 0.1C (20 mA g(-1)), and it can reach a reversible capacity of 78 mA h g(-1) and Coulombic efficiency of 96.6% after 100 cycles at the cutoff voltage of 4.5 V. Amazingly, combined with reduced graphene oxide (rGO) as an anode material, the ALD-30C-annealing cathode material exhibits notable full cell performance with the specific energy density of 160 Wh kg(-1) at the high voltage widows of 2.4-4.5 V after 100 cycles. The designed strategy in this work may be one of the most promising perspectives toward the high performance cathode materials for SIBs. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：11

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