CN110581258A - 一种泡沫铝极片的制备方法 - Google Patents

一种泡沫铝极片的制备方法 Download PDF

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CN110581258A
CN110581258A CN201910751362.7A CN201910751362A CN110581258A CN 110581258 A CN110581258 A CN 110581258A CN 201910751362 A CN201910751362 A CN 201910751362A CN 110581258 A CN110581258 A CN 110581258A
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foamed aluminum
pole piece
preparing
aluminum pole
drying
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艾燕
杨静如
颜倩
颜鹤
曹彩红
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Hunan Aihua Group Co Ltd
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    • H01—ELECTRIC ELEMENTS
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    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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    • H01M4/04—Processes of manufacture in general
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
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    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
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    • H—ELECTRICITY
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    • H01M4/00—Electrodes
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    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
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    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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Abstract

本发明涉及一种泡沫铝极片的制备方法，包括以下步骤：将泡沫铝浸于金属锂的液氨溶液中，取出干燥，再将磷酸铁锂浆料涂覆于泡沫铝表面，干燥后，于气态炔气氛下经光催化，使气态炔于泡沫铝表面裂解，得到负载有磷酸铁锂的碳颗粒的泡沫铝极片；所述络合剂为季铵盐。

Description

一种泡沫铝极片的制备方法
技术领域
本发明涉及新型材料领域，具体涉及一种泡沫铝极片的制备方法。
背景技术
随着电动汽车的发展，电动汽车对动力电池的要求越来越高，特别对其能量密度、倍率性能、循环寿命及安全性能、快充能力和使用寿命都提出了更高要求。
而磷酸铁锂材料以其循环寿命长、安全性能高等优点，成为锂离子电池的理想选择材料之一，并广泛应用在纯电动汽车、混合电动汽车等。
但是，磷酸铁锂材料的能量密度方面偏低，因此如何提高磷酸铁锂材料的能量密度成为研究的重点。
发明内容
本发明的目的为提供了一种泡沫的制备方法，该方法通过先对泡沫铝的预锂化，再涂覆磷酸铁锂，并结合紫外照射条件下的碳沉积技术，从而获得高倍率性能、高能量密度、高循环性能的泡沫铝极片。
本发明通过以下技术方案实现：
本发明一种泡沫铝的制备方法，包括以下步骤：
将泡沫铝浸于金属锂的液氨溶液中，取出干燥，再将磷酸铁锂浆料涂覆于泡沫铝表面，干燥后，于气态炔气氛下经光催化，使气态炔于泡沫铝表面裂解，得到负载有磷酸铁锂和碳颗粒的泡沫铝；
所述络合剂为季铵盐。
所述金属锂的液氨溶液中金属锂的浓度为0.8-1.2mol/L。
所述金属锂的液氨溶液中，季铵盐的浓度为0.5-1mol/L。
所述干燥为真空干燥。
所述干燥的温度为50-70℃。
所述气态炔为乙炔、丙炔或丁炔。
所述光催化的光源为紫外光源，所述紫外光源的波长为200-250nm。
所述季铵盐为聚烯亚胺。
所述泡沫铝的孔隙率为65-90％，厚度为25-40μm。
所述裂解的温度为600-800℃。
相对于现有技术，本发明的有益效果如下：
本发明的制备方法获得的泡沫铝极片具有层状结构，其倍率性能、能量密度、循环性能等电化学性能方面均较现有技术有所提高。
具体实施方式
实施例
按以下步骤制备泡沫铝极片：
将5g金属锂粉溶于710mL液氨中，之后在搅拌的条件下将50g聚乙烯亚胺加入到上述溶液中，搅拌均匀得到1mol/L的金属锂的液氨溶液；
将泡沫铝浸泡于上述金属锂的液氨溶液中。其中，所述泡沫铝的孔隙率为80％，厚度为30μm。然后于60℃下真空干燥。
然后将磷酸铁锂浆料涂覆于泡沫铝表面。
将负载有磷酸铁锂的泡沫铝极片于管式炉中，以200sccm的流量通入乙炔，在波长为250nm的紫外光的照射下升温到温度800℃并在此温度下保温反应20分钟，然后停止通入乙炔、关闭紫外光源，并停止加热，继续通入氮气直至冷却到室温，得到负载有磷酸铁锂和碳颗粒的泡沫铝极片。

Claims (10)

1.一种泡沫铝极片的制备方法，其特征在于，包括以下步骤：
将泡沫铝浸于金属锂的液氨溶液中，取出干燥，将磷酸铁锂浆料涂覆于泡沫铝表面，干燥后，于气态炔气氛下经光催化，使气态炔于泡沫铝表面裂解，得到负载有磷酸铁锂和碳颗粒的泡沫铝极片；
所述络合剂为季铵盐。
2.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述金属锂的液氨溶液中金属锂的浓度为0.8-1.2mol/L。
3.如权利要求1或2所述的泡沫铝极片的制备方法，其特征在于：所述金属锂的液氨溶液中，季铵盐的浓度为0.5-1mol/L。
4.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述干燥为真空干燥。
5.如权利要求1或4所述的泡沫铝极片的制备方法，其特征在于：所述干燥的温度为50-70℃。
6.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述气态炔为乙炔、丙炔或丁炔。
7.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述光催化的光源为紫外光源，所述紫外光源的波长为200-250nm。
8.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述季铵盐为聚烯亚胺。
9.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述泡沫铝的孔隙率为65-90％，厚度为25-40μm。
10.如权利要求1所述的泡沫铝极片的制备方法，其特征在于：所述裂解的温度为600-800℃。
CN201910751362.7A 2019-08-14 2019-08-14 一种泡沫铝极片的制备方法 Pending CN110581258A (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112928239A (zh) * 2021-03-31 2021-06-08 神华准能资源综合开发有限公司 一种泡沫材料成型的磷酸铁锂电极的制备方法及一种电池
CN113140694A (zh) * 2021-04-21 2021-07-20 中国科学院宁波材料技术与工程研究所 一种负极材料的预锂化方法
CN114180545A (zh) * 2021-12-10 2022-03-15 合肥国轩电池材料有限公司 一种除铜方法及废旧磷酸铁锂电芯粉制备磷酸铁的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104241606A (zh) * 2014-09-09 2014-12-24 海门容汇通用锂业有限公司 一种高倍率兼具优良低温性能的磷酸铁锂正极极片的制作方法
CN108258199A (zh) * 2018-01-19 2018-07-06 河北力滔电池材料有限公司 磷酸铁锂复合极片及制备方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104241606A (zh) * 2014-09-09 2014-12-24 海门容汇通用锂业有限公司 一种高倍率兼具优良低温性能的磷酸铁锂正极极片的制作方法
CN108258199A (zh) * 2018-01-19 2018-07-06 河北力滔电池材料有限公司 磷酸铁锂复合极片及制备方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112928239A (zh) * 2021-03-31 2021-06-08 神华准能资源综合开发有限公司 一种泡沫材料成型的磷酸铁锂电极的制备方法及一种电池
CN113140694A (zh) * 2021-04-21 2021-07-20 中国科学院宁波材料技术与工程研究所 一种负极材料的预锂化方法
CN114180545A (zh) * 2021-12-10 2022-03-15 合肥国轩电池材料有限公司 一种除铜方法及废旧磷酸铁锂电芯粉制备磷酸铁的方法

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Application publication date: 20191217