Green synthesis of mesoporous ZnFe₂O₄/C composite microspheres as superior anode materials for lithium-ion batteries

详细信息    查看全文

• 作者：Lingmin Yao^a ; ^b ; Xianhua Hou^a ; ^b ; ^{houxh@scnu.edu.cn" class="auth_mail} ; Shejun Hu^a ; ^b ; Jie Wang^a ; ^b ; Min Li^a ; ^b ; Chao Su^c ; Moses O. Tade^c ; Zongping Shao^c ; ^{zongping.shao@curtin.edu.au" class="auth_mail} ; Xiang Liu^d
• 关键词：Zinc ferrite ; Mesoporous ; Carbon network ; Citric acid
• 刊名：Journal of Power Sources
• 出版年：15 July, 2014
• 年：2014
• 卷：258
• 期：Complete
• 页码：305-313
• 全文大小：3445 K

文摘

The commercialized LIBs employing graphite as anodes currently suffer a series of problems from the safety, theoretical capacity (372聽mAh聽g^鈭?) and rate capability. Herein, self-assembly mesoporous Zn ferrite (ZnFe₂O₄) microsphere embedded into carbon network has been synthesized by a facile method in the presence of citric acid. The Zn ferrites as an anode material with novel structure demonstrate superior electrochemical performance, with enhanced specific reversible capacity (鈭?100聽mAh聽g^鈭? at the specific current of 0.05聽A聽g^鈭? after 100 cycles), excellent rate capability (more than 500聽mAh聽g^鈭? even at the specific current of 1.1聽A聽g^鈭?) and good cycleability with little fading (鈭?7.6% after 100 cycles). The excellent cycling performance is associated with the loose Zn ferrite microsphere with numerous mesopores embedded into the carbon network, which can accommodate the severe mechanism strains and provides good electrical contact and conductivity. The superior electrochemical performance may facilitate ZnFe₂O₄ to be a promising alternative anode in lithium ion battery.