制备了一种提高染料敏化太阳能电池短路电流和电池光电转化效率的准固态凝胶电解质,该电解质含有5%高聚物PVDF-HFP和2%TiO_2纳米颗粒。另外,通过乙醇相无皂乳液聚合法合成了大小均一的聚苯乙烯微球,并用于制备染料敏化太阳能电池的多孔...制备了一种提高染料敏化太阳能电池短路电流和电池光电转化效率的准固态凝胶电解质,该电解质含有5%高聚物PVDF-HFP和2%TiO_2纳米颗粒。另外,通过乙醇相无皂乳液聚合法合成了大小均一的聚苯乙烯微球,并用于制备染料敏化太阳能电池的多孔光阳极。研究了准固态电解质和液态电解质应用于不同光阳极染料敏化太阳能电池的规律。结果表明,与液态电解质相反,准固态电解更适用于孔洞较多的光阳极,在相同测试条件下,电池的短路电流由12.80 m A·cm^(-2)提高到13.53 m A·cm^(-2),效率比液态提高11.43%,达到6.63%。展开更多
Solid-state Na metal batteries(SSNBs),known for its low cost,high safety,and high energy density,hold a significant position in the next generation of rechargeable batteries.However,the urgent challenge of poor interf...Solid-state Na metal batteries(SSNBs),known for its low cost,high safety,and high energy density,hold a significant position in the next generation of rechargeable batteries.However,the urgent challenge of poor interfacial contact in solid-state electrolytes has hindered the commercialization of SSNBs.Driven by the concept of intimate electrode-electrolyte interface design,this study employs a combination of NaK alloy and carbon nanotubes to prepare a semi-solid NaK(NKC)anode.Unlike traditional Na anodes,the paintable paste-like NKC anode exhibits superior adhesion and interface compatibility with both current collectors and gel electrolytes,significantly enhancing the intimate contact of electrode-electrolyte interface.Additionally,the filling of SiO_(2)nanoparticles improves the wettability of NaK alloy on gel polymer electrolytes,further achieving a conformal interface contact.Consequently,the overpotential of the NKC symmetric cell is markedly lower than that of the Na symmetric cell when subjected to a long cycle of 300 h.The full cell coupled with Na_(3)V_(3)(PO_(4))_(2)cathodes had an initial discharge capacity of 106.8 mAh·g^(-1)with a capacity retention of 89.61%after 300 cycles,and a high discharge capacity of 88.1 mAh·g^(-1)even at a high rate of 10 C.The outstanding electrochemical performance highlights the promising application potential of the NKC electrode.展开更多
文摘制备了一种提高染料敏化太阳能电池短路电流和电池光电转化效率的准固态凝胶电解质,该电解质含有5%高聚物PVDF-HFP和2%TiO_2纳米颗粒。另外,通过乙醇相无皂乳液聚合法合成了大小均一的聚苯乙烯微球,并用于制备染料敏化太阳能电池的多孔光阳极。研究了准固态电解质和液态电解质应用于不同光阳极染料敏化太阳能电池的规律。结果表明,与液态电解质相反,准固态电解更适用于孔洞较多的光阳极,在相同测试条件下,电池的短路电流由12.80 m A·cm^(-2)提高到13.53 m A·cm^(-2),效率比液态提高11.43%,达到6.63%。
基金National Natural Science Foundation of China(52073253)。
文摘Solid-state Na metal batteries(SSNBs),known for its low cost,high safety,and high energy density,hold a significant position in the next generation of rechargeable batteries.However,the urgent challenge of poor interfacial contact in solid-state electrolytes has hindered the commercialization of SSNBs.Driven by the concept of intimate electrode-electrolyte interface design,this study employs a combination of NaK alloy and carbon nanotubes to prepare a semi-solid NaK(NKC)anode.Unlike traditional Na anodes,the paintable paste-like NKC anode exhibits superior adhesion and interface compatibility with both current collectors and gel electrolytes,significantly enhancing the intimate contact of electrode-electrolyte interface.Additionally,the filling of SiO_(2)nanoparticles improves the wettability of NaK alloy on gel polymer electrolytes,further achieving a conformal interface contact.Consequently,the overpotential of the NKC symmetric cell is markedly lower than that of the Na symmetric cell when subjected to a long cycle of 300 h.The full cell coupled with Na_(3)V_(3)(PO_(4))_(2)cathodes had an initial discharge capacity of 106.8 mAh·g^(-1)with a capacity retention of 89.61%after 300 cycles,and a high discharge capacity of 88.1 mAh·g^(-1)even at a high rate of 10 C.The outstanding electrochemical performance highlights the promising application potential of the NKC electrode.
