Smart wearable lens mounted with all-solid-state thin film secondary battery and method for manufacturing the same
Disclosed herein is a smart wearable lens mounted with an all-solid-state thin film secondary battery including a flexible substrate, a cathode current collector, a cathode, a solid electrolyte, an anode, and an anode current collector. The smart wearable lens mounted with the all-solid-state thin film secondary battery may be stably and continuously supplied with power and has a low self-discharge rate. In addition, the smart wearable lens may minimize aversion when humans are wearing the smart wearable lens and be suitably used for a curved lens, especially a micro-lens such as a contact lens.
1. A smart wearable lens, comprising a lens; and an all-solid-state thin film secondary battery mounted on the lens, wherein the all-solid-state thin film secondary battery comprises a flexible substrate, a cathode current collector, a cathode, a solid electrolyte, an anode, and an anode current collector,
wherein the all-solid-state thin film secondary battery further comprises a wireless charging coil connected to the anode current collector and cathode current collector, wherein the wireless charging coil is disposed on an uppermost layer of the all-solid-state thin film secondary battery,
wherein the solid electrolyte has a thickness of maximum of 300 nm or less and a width of 4.5 mm or less, the cathode current collector has a thickness of 200 nm or less and a width less than the width of the solid electrolyte, and the anode current collector has a thickness of 200 nm or less and a width less than the width of the solid electrolyte.
2. The smart wearable lens according to claim 1 , wherein:
the all-solid-state thin film secondary battery is positioned on the lens along with at least some of a curved region of the lens; and
the flexible substrate contacts with the lens.
3. The smart wearable lens according to claim 2 , wherein the all-solid-state thin film secondary battery has a constant width, and
the all-solid-state thin film secondary battery has inner and outer arcs so that the all-solid-state thin film secondary battery has a shape in which the inner arc has a shorter length than the outer arc.
4. The smart wearable lens according to claim 3 , wherein the cathode current collector is deposited on a portion of the flexible substrate which has a constant width and has inner and outer arcs so as to have a C-shape in which the inner arc has a shorter length than the outer arc;
the cathode is deposited on the cathode current collector;
the anode current collector is deposited on a portion of the flexible substrate in which the cathode current collector is not formed;
the solid electrolyte is deposited on the cathode; and
the anode is deposited on the solid electrolyte such that the anode is connected to the anode current collector, which is not covered by the solid electrolyte.
5. The smart wearable lens according to claim 2 , wherein the lens is a contact lens, and
the all-solid-state thin film secondary battery is positioned on a region except for a pupil region of the contact lens.
6. The smart wearable lens according to claim 5 , wherein the all-solid-state thin film secondary battery has a C-shape and is positioned along with edged and curved region of the contact lens.
7. The smart wearable lens according to claim 6 , wherein the all-solid-state thin film secondary battery has a width of 4.5 mm or less, and
the all-solid-state thin film secondary battery excluding the substrate has a thickness of maximum of 100 μm or less.
8. The smart wearable lens according to claim 5 , wherein:
the all-solid-state thin film secondary battery consists of a plurality of all-solid-state thin film secondary batteries formed on flexible substrates having different shapes and sizes; and
the plurality of all-solid-state thin film secondary batteries are positioned in series or in parallel on a region except for the pupil region of the contact lens.
9. The smart wearable lens according to claim 1 , wherein the flexible substrate is a polyimide substrate, a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate (PEN) substrate, or an exfoliated mica substrate.
10. The smart wearable lens according to claim 1 , wherein the all-solid-state thin film secondary battery is packaged.
11. A method for manufacturing a smart wearable lens mounted with an all-solid-state thin film secondary battery, comprising:
preparing an all-solid-state thin film secondary battery by forming a cathode current collector, a cathode, a solid electrolyte, an anode, and an anode current collector on a flexible substrate; and
attaching the prepared all-solid-state thin film secondary battery on a smart wearable lens,
wherein the all-solid-state thin film secondary battery further comprises a wireless charging coil connected to the anode current collector and cathode current collector, wherein the wireless charging coil is disposed on an uppermost layer of the all-solid-state thin film secondary battery,
wherein the solid electrolyte that has a thickness of maximum of 300 nm or less and a width of 4.5 mm or less, the cathode current collector has a thickness of 200 nm or less and a width less than the width of the solid electrolyte, and the anode current collector has a thickness of 200 nm or less and a width less than the width of the solid electrolyte.
12. The method according to claim 11 , wherein:
the smart wearable lens is a contact lens;
the all-solid-state thin film secondary battery is attached onto the contact lens so as to be positioned along with at least some of edged and curved region of the contact lens, except for a pupil region of the contact lens,
and the flexible substrate contacts with the contact lens.
13. The method according to claim 12 , wherein the preparing of an all-solid-state thin film secondary battery comprises:
depositing the cathode current collector on a portion of the flexible substrate, wherein the flexible substrate has a constant width and has inner and outer arcs so as to have a C-shape in which the inner arc has a shorter length than the outer arc;
depositing the cathode on the cathode current collector;
depositing the anode current collector on a portion of the flexible substrate in which the cathode current collector is not formed;
depositing the solid electrolyte on the cathode; and
depositing the anode on the solid electrolyte such that the anode is connected to the anode current collector, which is not covered by the solid electrolyte.
14. The method according to claim 13 , wherein:
the cathode is deposited and then crystallized; and
the flexible substrate is a polyimide substrate, a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate (PEN) substrate, or an exfoliated mica substrate.
15. The method according to claim 13 , further comprising packaging the all-solid-state thin film secondary battery with a packaging material.