Graphene-Oxide-Assisted Synthesis of Ga2O3 Nanosheets/Reduced Graphene Oxide Nanocomposites Anodes for Advanced Alkali-Ion Batteries
Graphene-Oxide-Assisted Synthesis of Ga2O3 Nanosheets/Reduced Graphene Oxide Nanocomposites Anodes for Advanced Alkali-Ion Batteries
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DOI：
10.1021/acsaem.8b00826
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发表时间：
2018-08
影响因子：
6.4
通讯作者：
Mingzhi Yang;Changlong Sun;Tailin Wang;Fuzhou Chen;Minglei Sun;Lei Zhang;Yongliang Shao;Yongzhong Wu;Xiaopeng Hao
中科院分区：
文献类型：
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作者：
Mingzhi Yang;Changlong Sun;Tailin Wang;Fuzhou Chen;Minglei Sun;Lei Zhang;Yongliang Shao;Yongzhong Wu;Xiaopeng Hao
在此，我们提出了一种通过含氧基团的亲水性氧化石墨烯（GO）模板和随后的退火处理直接制备氧化镓纳米片/还原氧化石墨烯（Ga 2 O3 NSs/rGO）纳米复合材料的实用方法。受益于Ga 2 O3 NS和rGO的二维（2D）纳米结构，Ga 2 O3 NS/rGO纳米复合材料在Li离子和Na离子电池（LIB/SIB）中表现出增强的动力学和改善的循环稳定性。通过动力学分析验证了其赝电容性能。非原位XRD和XPS测试结果表明，Ga 2 O3 NSs/rGO电极中锂离子的可逆存储是一种转化反应和合金化机制。此外，将Ga 2 O3 NSs/rGO阳极与LiFePO 4/C或Na 3V 2（PO 4）3/C阴极耦合制成的全电池表现出优异的电化学性能。总的来说，这种新的方法，这是不特定于Ga 2 O3 NS/rGO纳米复合材料，提供了很大的机会，二维氧化物纳米材料或纳米复合材料作为高性能…
Herein, we propose a practical way for direct preparation of gallium oxide nanosheets/reduced graphene oxide (Ga2O3 NSs/rGO) nanocomposites via oxygenic groups contained hydrophilic graphene oxide (GO) template with subsequent annealing treatment. Benefiting from the two-dimensional (2D) nanoarchitecture of Ga2O3 NSs and rGO, Ga2O3 NSs/rGO nanocomposites exhibit enhanced kinetics and improved cycling stability in Li-ion and Na-ion batteries (LIBs/SIBs). The pseudocapacitance performance is authenticated through kinetic analysis. Ex situ XRD and XPS measurements prove that the reversible Li-ion storage in Ga2O3 NSs/rGO electrodes is a conversion reaction and alloying mechanism. In addition, the full cells fabricated by coupling Ga2O3 NSs/rGO anode and LiFePO4/C or Na3V2(PO4)3/C cathodes exhibit outstanding electrochemical performances. In general, such a new approach, which is not specific to Ga2O3 NSs/rGO nanocomposites, offers great opportunities for 2D oxide nanomaterials or nanocomposites as high-perfo...