Porous NaTi2(PO4)3@C nanocubes as improved anode for sodium-ion batteries
Porous NaTi2(PO4)3@C nanocubes as improved anode for sodium-ion batteries
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多孔NaTi2(PO4)3@C纳米立方体作为改进的钠离子电池阳极
DOI：
10.1016/j.materresbull.2017.11.030
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发表时间：
2018-03-01
影响因子：
5.4
通讯作者：
Ma, Jianmin
中科院分区：
文献类型：
--
作者：
Liang, Jiaojiao;Fan, Kai;Ma, Jianmin
NASICON型NaTi_2（PO_4）（3）作为钠离子电池负极材料，由于其结构稳定、成本低廉而备受关注。然而，NaTi 2（PO 4）（3）的绝缘性质和约2.1V（相对于Na+/Na）的高工作电位导致其循环稳定性差、速率低、性能以及低容量。本文以油酸为碳源，采用水热法和包覆法制备了多孔NaTi 2（PO 4）（3）@C纳米立方体。在0.01 ~ 3.0 V电压范围内，该纳米立方体材料作为钠离子电池的负极，在100 mA·g（-1）的电流密度下循环100次后，放电容量达到201 mAh·g（-1）。当电流密度为1A·g（-1）时，1000次循环后的保留容量可达140 mAh·g（-1）。
The NASICON-type NaTi2(PO4)(3) has drawn much attention as anode material for sodium-ion batteries owing to its stable structural characteristics and low cost. Nevertheless, the insulating property of NaTi2(PO4)(3) and the high working potential of about 2.1 V vs. Na+/Na lead to its poor cycling stability, low rate, performance as well as inferior capacity. In this work, we synthesize the porous NaTi2(PO4)(3)@C nanocubes by hydrothermal method and a subsequent coating process with using oleic acid as the carbon source. When utilized as the anode for sodium-ion battery in the voltage range between 0.01 V and 3.0 V, The as-synthesized porous NaTi2(PO4)(3)@C nanocubes deliver a discharge capacity of 201 mAh.g(-1) at the current density of 100 mA g(-1) after 100 cycles. Additionally, the reserved capacity of 140 mAh.g(-1) could be achieved at the current density of 1 A g(-1) after 1000 cycles.