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Title: Methods and apparatus to facilitate alkali metal transport during battery cycling, and batteries incorporating same

Patent ·
OSTI ID:1986750

An anode includes a mixed ionic-electronic conductor (MIEC) with an open pore structure. The open pore structure includes open pores to facilitate motion of an alkali metal into and/or out of the MIEC. The open pore structure thus provides open space to relieve the stresses generated by the alkali metal when charging/discharging a battery. The MIEC is formed from a material that is thermodynamically and electrochemically stable against the alkali metal to prevent the formation of solid-electrolyte interphase (SEI) debris and the formation of dead alkali metal. The MIEC may also be passive (the MIEC does not store or release alkali metal). In one example, the open pore structure may be an array of substantially aligned tubules with a width less than about 300 nm, a wall thickness between about 1 nm to about 30 nm, and a height of at least 10 um arranged as a honeycomb.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
DOE Contract Number:
SC0002633; ECCS-1610806
Assignee:
Massachusetts Institute of Technology (Cambridge, MA)
Patent Number(s):
11,482,708
Application Number:
16/499,656
OSTI ID:
1986750
Resource Relation:
Patent File Date: 09/23/2019
Country of Publication:
United States
Language:
English

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